peter-gribanov / sphinx-php-client

src/SphinxClient.php

Indentation +1737 added lines, -1737 removed lines

@@ -140,1771 +140,1771 @@
 /// pack 64-bit signed
 function sphPackI64($v)
 {
-    assert(is_numeric($v));
-
-    // x64
-    if (PHP_INT_SIZE >= 8) {
-        $v = (int)$v;
-        return pack('NN', $v >> 32, $v & 0xFFFFFFFF);
-    }
-
-    // x32, int
-    if (is_int($v)) {
-        return pack('NN', $v < 0 ? -1 : 0, $v);
-    }
-
-    // x32, bcmath
-    if (function_exists('bcmul')) {
-        if (bccomp($v, 0) == -1) {
-            $v = bcadd('18446744073709551616', $v);
-        }
-        $h = bcdiv($v, '4294967296', 0);
-        $l = bcmod($v, '4294967296');
-        return pack('NN', (float)$h, (float)$l); // conversion to float is intentional; int would lose 31st bit
-    }
-
-    // x32, no-bcmath
-    $p = max(0, strlen($v) - 13);
-    $lo = abs((float)substr($v, $p));
-    $hi = abs((float)substr($v, 0, $p));
-
-    $m = $lo + $hi * 1316134912.0; // (10 ^ 13) % (1 << 32) = 1316134912
-    $q = floor($m / 4294967296.0);
-    $l = $m - ($q * 4294967296.0);
-    $h = $hi * 2328.0 + $q; // (10 ^ 13) / (1 << 32) = 2328
-
-    if ($v < 0) {
-        if ($l == 0) {
-            $h = 4294967296.0 - $h;
-        } else {
-            $h = 4294967295.0 - $h;
-            $l = 4294967296.0 - $l;
-        }
-    }
-    return pack('NN', $h, $l);
+	assert(is_numeric($v));
+
+	// x64
+	if (PHP_INT_SIZE >= 8) {
+		$v = (int)$v;
+		return pack('NN', $v >> 32, $v & 0xFFFFFFFF);
+	}
+
+	// x32, int
+	if (is_int($v)) {
+		return pack('NN', $v < 0 ? -1 : 0, $v);
+	}
+
+	// x32, bcmath
+	if (function_exists('bcmul')) {
+		if (bccomp($v, 0) == -1) {
+			$v = bcadd('18446744073709551616', $v);
+		}
+		$h = bcdiv($v, '4294967296', 0);
+		$l = bcmod($v, '4294967296');
+		return pack('NN', (float)$h, (float)$l); // conversion to float is intentional; int would lose 31st bit
+	}
+
+	// x32, no-bcmath
+	$p = max(0, strlen($v) - 13);
+	$lo = abs((float)substr($v, $p));
+	$hi = abs((float)substr($v, 0, $p));
+
+	$m = $lo + $hi * 1316134912.0; // (10 ^ 13) % (1 << 32) = 1316134912
+	$q = floor($m / 4294967296.0);
+	$l = $m - ($q * 4294967296.0);
+	$h = $hi * 2328.0 + $q; // (10 ^ 13) / (1 << 32) = 2328
+
+	if ($v < 0) {
+		if ($l == 0) {
+			$h = 4294967296.0 - $h;
+		} else {
+			$h = 4294967295.0 - $h;
+			$l = 4294967296.0 - $l;
+		}
+	}
+	return pack('NN', $h, $l);
 }
 
 /// pack 64-bit unsigned
 function sphPackU64($v)
 {
-    assert(is_numeric($v));
-
-    // x64
-    if (PHP_INT_SIZE >= 8) {
-        assert($v >= 0);
-
-        // x64, int
-        if (is_int($v)) {
-            return pack('NN', $v >> 32, $v & 0xFFFFFFFF);
-        }
-
-        // x64, bcmath
-        if (function_exists('bcmul')) {
-            $h = bcdiv($v, 4294967296, 0);
-            $l = bcmod($v, 4294967296);
-            return pack('NN', $h, $l);
-        }
-
-        // x64, no-bcmath
-        $p = max(0, strlen($v) - 13);
-        $lo = (int)substr($v, $p);
-        $hi = (int)substr($v, 0, $p);
-
-        $m = $lo + $hi * 1316134912;
-        $l = $m % 4294967296;
-        $h = $hi * 2328 + (int)($m / 4294967296);
-
-        return pack('NN', $h, $l);
-    }
-
-    // x32, int
-    if (is_int($v)) {
-        return pack('NN', 0, $v);
-    }
-
-    // x32, bcmath
-    if (function_exists('bcmul')) {
-        $h = bcdiv($v, '4294967296', 0);
-        $l = bcmod($v, '4294967296');
-        return pack('NN', (float)$h, (float)$l); // conversion to float is intentional; int would lose 31st bit
-    }
-
-    // x32, no-bcmath
-    $p = max(0, strlen($v) - 13);
-    $lo = (float)substr($v, $p);
-    $hi = (float)substr($v, 0, $p);
-
-    $m = $lo + $hi * 1316134912.0;
-    $q = floor($m / 4294967296.0);
-    $l = $m - ($q * 4294967296.0);
-    $h = $hi * 2328.0 + $q;
-
-    return pack('NN', $h, $l);
+	assert(is_numeric($v));
+
+	// x64
+	if (PHP_INT_SIZE >= 8) {
+		assert($v >= 0);
+
+		// x64, int
+		if (is_int($v)) {
+			return pack('NN', $v >> 32, $v & 0xFFFFFFFF);
+		}
+
+		// x64, bcmath
+		if (function_exists('bcmul')) {
+			$h = bcdiv($v, 4294967296, 0);
+			$l = bcmod($v, 4294967296);
+			return pack('NN', $h, $l);
+		}
+
+		// x64, no-bcmath
+		$p = max(0, strlen($v) - 13);
+		$lo = (int)substr($v, $p);
+		$hi = (int)substr($v, 0, $p);
+
+		$m = $lo + $hi * 1316134912;
+		$l = $m % 4294967296;
+		$h = $hi * 2328 + (int)($m / 4294967296);
+
+		return pack('NN', $h, $l);
+	}
+
+	// x32, int
+	if (is_int($v)) {
+		return pack('NN', 0, $v);
+	}
+
+	// x32, bcmath
+	if (function_exists('bcmul')) {
+		$h = bcdiv($v, '4294967296', 0);
+		$l = bcmod($v, '4294967296');
+		return pack('NN', (float)$h, (float)$l); // conversion to float is intentional; int would lose 31st bit
+	}
+
+	// x32, no-bcmath
+	$p = max(0, strlen($v) - 13);
+	$lo = (float)substr($v, $p);
+	$hi = (float)substr($v, 0, $p);
+
+	$m = $lo + $hi * 1316134912.0;
+	$q = floor($m / 4294967296.0);
+	$l = $m - ($q * 4294967296.0);
+	$h = $hi * 2328.0 + $q;
+
+	return pack('NN', $h, $l);
 }
 
 // unpack 64-bit unsigned
 function sphUnpackU64($v)
 {
-    list($hi, $lo) = array_values(unpack('N*N*', $v));
-
-    if (PHP_INT_SIZE >= 8) {
-        if ($hi < 0) { // because php 5.2.2 to 5.2.5 is totally fucked up again
-            $hi += 1 << 32;
-        }
-        if ($lo < 0) {
-            $lo += 1 << 32;
-        }
-
-        // x64, int
-        if ($hi <= 2147483647) {
-            return ($hi << 32) + $lo;
-        }
-
-        // x64, bcmath
-        if (function_exists('bcmul')) {
-            return bcadd($lo, bcmul($hi, '4294967296'));
-        }
-
-        // x64, no-bcmath
-        $C = 100000;
-        $h = ((int)($hi / $C) << 32) + (int)($lo / $C);
-        $l = (($hi % $C) << 32) + ($lo % $C);
-        if ($l > $C) {
-            $h += (int)($l / $C);
-            $l  = $l % $C;
-        }
-
-        if ($h == 0) {
-            return $l;
-        }
-        return sprintf('%d%05d', $h, $l);
-    }
-
-    // x32, int
-    if ($hi == 0) {
-        if ($lo > 0) {
-            return $lo;
-        }
-        return sprintf('%u', $lo);
-    }
-
-    $hi = sprintf('%u', $hi);
-    $lo = sprintf('%u', $lo);
-
-    // x32, bcmath
-    if (function_exists('bcmul')) {
-        return bcadd($lo, bcmul($hi, '4294967296'));
-    }
-
-    // x32, no-bcmath
-    $hi = (float)$hi;
-    $lo = (float)$lo;
-
-    $q = floor($hi / 10000000.0);
-    $r = $hi - $q * 10000000.0;
-    $m = $lo + $r * 4967296.0;
-    $mq = floor($m / 10000000.0);
-    $l = $m - $mq * 10000000.0;
-    $h = $q * 4294967296.0 + $r * 429.0 + $mq;
-
-    $h = sprintf('%.0f', $h);
-    $l = sprintf('%07.0f', $l);
-    if ($h == '0') {
-        return sprintf('%.0f', (float)$l);
-    }
-    return $h . $l;
+	list($hi, $lo) = array_values(unpack('N*N*', $v));
+
+	if (PHP_INT_SIZE >= 8) {
+		if ($hi < 0) { // because php 5.2.2 to 5.2.5 is totally fucked up again
+			$hi += 1 << 32;
+		}
+		if ($lo < 0) {
+			$lo += 1 << 32;
+		}
+
+		// x64, int
+		if ($hi <= 2147483647) {
+			return ($hi << 32) + $lo;
+		}
+
+		// x64, bcmath
+		if (function_exists('bcmul')) {
+			return bcadd($lo, bcmul($hi, '4294967296'));
+		}
+
+		// x64, no-bcmath
+		$C = 100000;
+		$h = ((int)($hi / $C) << 32) + (int)($lo / $C);
+		$l = (($hi % $C) << 32) + ($lo % $C);
+		if ($l > $C) {
+			$h += (int)($l / $C);
+			$l  = $l % $C;
+		}
+
+		if ($h == 0) {
+			return $l;
+		}
+		return sprintf('%d%05d', $h, $l);
+	}
+
+	// x32, int
+	if ($hi == 0) {
+		if ($lo > 0) {
+			return $lo;
+		}
+		return sprintf('%u', $lo);
+	}
+
+	$hi = sprintf('%u', $hi);
+	$lo = sprintf('%u', $lo);
+
+	// x32, bcmath
+	if (function_exists('bcmul')) {
+		return bcadd($lo, bcmul($hi, '4294967296'));
+	}
+
+	// x32, no-bcmath
+	$hi = (float)$hi;
+	$lo = (float)$lo;
+
+	$q = floor($hi / 10000000.0);
+	$r = $hi - $q * 10000000.0;
+	$m = $lo + $r * 4967296.0;
+	$mq = floor($m / 10000000.0);
+	$l = $m - $mq * 10000000.0;
+	$h = $q * 4294967296.0 + $r * 429.0 + $mq;
+
+	$h = sprintf('%.0f', $h);
+	$l = sprintf('%07.0f', $l);
+	if ($h == '0') {
+		return sprintf('%.0f', (float)$l);
+	}
+	return $h . $l;
 }
 
 // unpack 64-bit signed
 function sphUnpackI64($v)
 {
-    list($hi, $lo) = array_values(unpack('N*N*', $v));
-
-    // x64
-    if (PHP_INT_SIZE >= 8) {
-        if ($hi < 0) { // because php 5.2.2 to 5.2.5 is totally fucked up again
-            $hi += 1 << 32;
-        }
-        if ($lo < 0) {
-            $lo += 1 << 32;
-        }
-
-        return ($hi << 32) + $lo;
-    }
-
-    if ($hi == 0) { // x32, int
-        if ($lo > 0) {
-            return $lo;
-        }
-        return sprintf('%u', $lo);
-    } elseif ($hi == -1) { // x32, int
-        if ($lo < 0) {
-            return $lo;
-        }
-        return sprintf('%.0f', $lo - 4294967296.0);
-    }
-
-    $neg = '';
-    $c = 0;
-    if ($hi < 0) {
-        $hi = ~$hi;
-        $lo = ~$lo;
-        $c = 1;
-        $neg = '-';
-    }
-
-    $hi = sprintf('%u', $hi);
-    $lo = sprintf('%u', $lo);
-
-    // x32, bcmath
-    if (function_exists('bcmul')) {
-        return $neg . bcadd(bcadd($lo, bcmul($hi, '4294967296')), $c);
-    }
-
-    // x32, no-bcmath
-    $hi = (float)$hi;
-    $lo = (float)$lo;
-
-    $q = floor($hi / 10000000.0);
-    $r = $hi - $q * 10000000.0;
-    $m = $lo + $r * 4967296.0;
-    $mq = floor($m / 10000000.0);
-    $l = $m - $mq * 10000000.0 + $c;
-    $h = $q * 4294967296.0 + $r * 429.0 + $mq;
-    if ($l == 10000000) {
-        $l = 0;
-        $h += 1;
-    }
-
-    $h = sprintf('%.0f', $h);
-    $l = sprintf('%07.0f', $l);
-    if ($h == '0') {
-        return $neg . sprintf('%.0f', (float)$l);
-    }
-    return $neg . $h . $l;
+	list($hi, $lo) = array_values(unpack('N*N*', $v));
+
+	// x64
+	if (PHP_INT_SIZE >= 8) {
+		if ($hi < 0) { // because php 5.2.2 to 5.2.5 is totally fucked up again
+			$hi += 1 << 32;
+		}
+		if ($lo < 0) {
+			$lo += 1 << 32;
+		}
+
+		return ($hi << 32) + $lo;
+	}
+
+	if ($hi == 0) { // x32, int
+		if ($lo > 0) {
+			return $lo;
+		}
+		return sprintf('%u', $lo);
+	} elseif ($hi == -1) { // x32, int
+		if ($lo < 0) {
+			return $lo;
+		}
+		return sprintf('%.0f', $lo - 4294967296.0);
+	}
+
+	$neg = '';
+	$c = 0;
+	if ($hi < 0) {
+		$hi = ~$hi;
+		$lo = ~$lo;
+		$c = 1;
+		$neg = '-';
+	}
+
+	$hi = sprintf('%u', $hi);
+	$lo = sprintf('%u', $lo);
+
+	// x32, bcmath
+	if (function_exists('bcmul')) {
+		return $neg . bcadd(bcadd($lo, bcmul($hi, '4294967296')), $c);
+	}
+
+	// x32, no-bcmath
+	$hi = (float)$hi;
+	$lo = (float)$lo;
+
+	$q = floor($hi / 10000000.0);
+	$r = $hi - $q * 10000000.0;
+	$m = $lo + $r * 4967296.0;
+	$mq = floor($m / 10000000.0);
+	$l = $m - $mq * 10000000.0 + $c;
+	$h = $q * 4294967296.0 + $r * 429.0 + $mq;
+	if ($l == 10000000) {
+		$l = 0;
+		$h += 1;
+	}
+
+	$h = sprintf('%.0f', $h);
+	$l = sprintf('%07.0f', $l);
+	if ($h == '0') {
+		return $neg . sprintf('%.0f', (float)$l);
+	}
+	return $neg . $h . $l;
 }
 
 
 function sphFixUint($value)
 {
-    if (PHP_INT_SIZE >= 8) {
-        // x64 route, workaround broken unpack() in 5.2.2+
-        if ($value < 0) {
-            $value += 1 << 32;
-        }
-        return $value;
-    } else {
-        // x32 route, workaround php signed/unsigned braindamage
-        return sprintf('%u', $value);
-    }
+	if (PHP_INT_SIZE >= 8) {
+		// x64 route, workaround broken unpack() in 5.2.2+
+		if ($value < 0) {
+			$value += 1 << 32;
+		}
+		return $value;
+	} else {
+		// x32 route, workaround php signed/unsigned braindamage
+		return sprintf('%u', $value);
+	}
 }
 
 function sphSetBit($flag, $bit, $on)
 {
-    if ($on) {
-        $flag |= 1 << $bit;
-    } else {
-        $reset = 16777215 ^ (1 << $bit);
-        $flag = $flag & $reset;
-    }
-    return $flag;
+	if ($on) {
+		$flag |= 1 << $bit;
+	} else {
+		$reset = 16777215 ^ (1 << $bit);
+		$flag = $flag & $reset;
+	}
+	return $flag;
 }
 
 
 /// sphinx searchd client class
 class SphinxClient
 {
-    protected $host = 'localhost'; ///< searchd host (default is 'localhost')
-    protected $port = 9312; ///< searchd port (default is 9312)
-    protected $offset = 0; ///< how many records to seek from result-set start (default is 0)
-    protected $limit = 20; ///< how many records to return from result-set starting at offset (default is 20)
-    protected $mode = SPH_MATCH_EXTENDED2; ///< query matching mode (default is SPH_MATCH_EXTENDED2)
-    protected $weights = array(); ///< per-field weights (default is 1 for all fields)
-    protected $sort = SPH_SORT_RELEVANCE; ///< match sorting mode (default is SPH_SORT_RELEVANCE)
-    protected $sort_by = ''; ///< attribute to sort by (defualt is '')
-    protected $min_id = 0; ///< min ID to match (default is 0, which means no limit)
-    protected $max_id = 0; ///< max ID to match (default is 0, which means no limit)
-    protected $filters = array(); ///< search filters
-    protected $group_by = ''; ///< group-by attribute name
-    protected $group_func = SPH_GROUPBY_DAY; ///< group-by function (to pre-process group-by attribute value with)
-    protected $group_sort = '@group desc'; ///< group-by sorting clause (to sort groups in result set with)
-    protected $group_distinct = ''; ///< group-by count-distinct attribute
-    protected $max_matches = 1000; ///< max matches to retrieve
-    protected $cutoff = 0; ///< cutoff to stop searching at (default is 0)
-    protected $retry_count = 0; ///< distributed retries count
-    protected $retry_delay = 0; ///< distributed retries delay
-    protected $anchor = array(); ///< geographical anchor point
-    protected $index_weights = array(); ///< per-index weights
-    protected $ranker = SPH_RANK_PROXIMITY_BM25; ///< ranking mode (default is SPH_RANK_PROXIMITY_BM25)
-    protected $rank_expr = ''; ///< ranking mode expression (for SPH_RANK_EXPR)
-    protected $max_query_time = 0; ///< max query time, milliseconds (default is 0, do not limit)
-    protected $field_weights = array(); ///< per-field-name weights
-    protected $overrides = array(); ///< per-query attribute values overrides
-    protected $select = '*'; ///< select-list (attributes or expressions, with optional aliases)
-    protected $query_flags = 0; ///< per-query various flags
-    protected $predicted_time = 0; ///< per-query max_predicted_time
-    protected $outer_order_by = ''; ///< outer match sort by
-    protected $outer_offset = 0; ///< outer offset
-    protected $outer_limit = 0; ///< outer limit
-    protected $has_outer = false;
-
-    protected $error = ''; ///< last error message
-    protected $warning = ''; ///< last warning message
-    protected $conn_error = false; ///< connection error vs remote error flag
-
-    protected $reqs = array(); ///< requests array for multi-query
-    protected $mbenc = ''; ///< stored mbstring encoding
-    protected $array_result = false; ///< whether $result['matches'] should be a hash or an array
-    protected $timeout = 0; ///< connect timeout
-
-    protected $path = false;
-    protected $socket = false;
-
-    /////////////////////////////////////////////////////////////////////////////
-    // common stuff
-    /////////////////////////////////////////////////////////////////////////////
-
-    public function __construct()
-    {
-        $this->query_flags = sphSetBit(0, 6, true); // default idf=tfidf_normalized
-    }
-
-    public function __destruct()
-    {
-        if ($this->socket !== false) {
-            fclose($this->socket);
-        }
-    }
-
-    /// get last error message (string)
-    public function getLastError()
-    {
-        return $this->error;
-    }
-
-    /// get last warning message (string)
-    public function getLastWarning()
-    {
-        return $this->warning;
-    }
-
-    /// get last error flag (to tell network connection errors from searchd errors or broken responses)
-    public function isConnectError()
-    {
-        return $this->conn_error;
-    }
-
-    /// set searchd host name (string) and port (integer)
-    public function setServer($host, $port = 0)
-    {
-        assert(is_string($host));
-        if ($host[0] == '/') {
-            $this->path = 'unix://' . $host;
-            return;
-        }
-        if (substr($host, 0, 7) == 'unix://') {
-            $this->path = $host;
-            return;
-        }
-
-        $this->host = $host;
-        $port = intval($port);
-        assert(0 <= $port && $port < 65536);
-        $this->port = $port == 0 ? 9312 : $port;
-        $this->path = '';
-    }
-
-    /// set server connection timeout (0 to remove)
-    public function setConnectTimeout($timeout)
-    {
-        assert(is_numeric($timeout));
-        $this->timeout = $timeout;
-    }
-
-
-    protected function send($handle, $data, $length)
-    {
-        if (feof($handle) || fwrite($handle, $data, $length) !== $length) {
-            $this->error = 'connection unexpectedly closed (timed out?)';
-            $this->conn_error = true;
-            return false;
-        }
-        return true;
-    }
-
-    /////////////////////////////////////////////////////////////////////////////
-
-    /// enter mbstring workaround mode
-    protected function mbPush()
-    {
-        $this->mbenc = '';
-        if (ini_get('mbstring.func_overload') & 2) {
-            $this->mbenc = mb_internal_encoding();
-            mb_internal_encoding('latin1');
-        }
-    }
-
-    /// leave mbstring workaround mode
-    protected function mbPop()
-    {
-        if ($this->mbenc) {
-            mb_internal_encoding($this->mbenc);
-        }
-    }
-
-    /// connect to searchd server
-    protected function connect()
-    {
-        if ($this->socket !== false) {
-            // we are in persistent connection mode, so we have a socket
-            // however, need to check whether it's still alive
-            if (!@feof($this->socket)) {
-                return $this->socket;
-            }
-
-            // force reopen
-            $this->socket = false;
-        }
-
-        $errno = 0;
-        $errstr = '';
-        $this->conn_error = false;
-
-        if ($this->path) {
-            $host = $this->path;
-            $port = 0;
-        } else {
-            $host = $this->host;
-            $port = $this->port;
-        }
-
-        if ($this->timeout <= 0) {
-            $fp = @fsockopen($host, $port, $errno, $errstr);
-        } else {
-            $fp = @fsockopen($host, $port, $errno, $errstr, $this->timeout);
-        }
-
-        if (!$fp) {
-            if ($this->path) {
-                $location = $this->path;
-            } else {
-                $location = "{$this->host}:{$this->port}";
-            }
-
-            $errstr = trim($errstr);
-            $this->error = "connection to $location failed (errno=$errno, msg=$errstr)";
-            $this->conn_error = true;
-            return false;
-        }
-
-        // send my version
-        // this is a subtle part. we must do it before (!) reading back from searchd.
-        // because otherwise under some conditions (reported on FreeBSD for instance)
-        // TCP stack could throttle write-write-read pattern because of Nagle.
-        if (!$this->send($fp, pack('N', 1), 4)) {
-            fclose($fp);
-            $this->error = 'failed to send client protocol version';
-            return false;
-        }
-
-        // check version
-        list(, $v) = unpack('N*', fread($fp, 4));
-        $v = (int)$v;
-        if ($v < 1) {
-            fclose($fp);
-            $this->error = "expected searchd protocol version 1+, got version '$v'";
-            return false;
-        }
-
-        return $fp;
-    }
-
-    /// get and check response packet from searchd server
-    protected function getResponse($fp, $client_ver)
-    {
-        $response = '';
-        $len = 0;
-
-        $header = fread($fp, 8);
-        if (strlen($header) == 8) {
-            list($status, $ver, $len) = array_values(unpack('n2a/Nb', $header));
-            $left = $len;
-            while ($left > 0 && !feof($fp)) {
-                $chunk = fread($fp, min(8192, $left));
-                if ($chunk) {
-                    $response .= $chunk;
-                    $left -= strlen($chunk);
-                }
-            }
-        }
-        if ($this->socket === false) {
-            fclose($fp);
-        }
-
-        // check response
-        $read = strlen($response);
-        if (!$response || $read != $len) {
-            $this->error = $len
-                ? "failed to read searchd response (status=$status, ver=$ver, len=$len, read=$read)"
-                : 'received zero-sized searchd response';
-            return false;
-        }
-
-        // check status
-        if ($status == SEARCHD_WARNING) {
-            list(, $wlen) = unpack('N*', substr($response, 0, 4));
-            $this->warning = substr($response, 4, $wlen);
-            return substr($response, 4 + $wlen);
-        }
-        if ($status == SEARCHD_ERROR) {
-            $this->error = 'searchd error: ' . substr($response, 4);
-            return false;
-        }
-        if ($status == SEARCHD_RETRY) {
-            $this->error = 'temporary searchd error: ' . substr($response, 4);
-            return false;
-        }
-        if ($status != SEARCHD_OK) {
-            $this->error = "unknown status code '$status'";
-            return false;
-        }
-
-        // check version
-        if ($ver < $client_ver) {
-            $this->warning = sprintf(
-                'searchd command v.%d.%d older than client\'s v.%d.%d, some options might not work',
-                $ver >> 8,
-                $ver & 0xff,
-                $client_ver >> 8,
-                $client_ver & 0xff
-            );
-        }
-
-        return $response;
-    }
-
-    /////////////////////////////////////////////////////////////////////////////
-    // searching
-    /////////////////////////////////////////////////////////////////////////////
-
-    /// set offset and count into result set,
-    /// and optionally set max-matches and cutoff limits
-    public function setLimits($offset, $limit, $max = 0, $cutoff = 0)
-    {
-        assert(is_int($offset));
-        assert(is_int($limit));
-        assert($offset >= 0);
-        assert($limit > 0);
-        assert($max >= 0);
-        $this->offset = $offset;
-        $this->limit = $limit;
-        if ($max > 0) {
-            $this->max_matches = $max;
-        }
-        if ($cutoff > 0) {
-            $this->cutoff = $cutoff;
-        }
-    }
-
-    /// set maximum query time, in milliseconds, per-index
-    /// integer, 0 means 'do not limit'
-    public function setMaxQueryTime($max)
-    {
-        assert(is_int($max));
-        assert($max >= 0);
-        $this->max_query_time = $max;
-    }
-
-    /// set matching mode
-    public function setMatchMode($mode)
-    {
-        trigger_error(
-            'DEPRECATED: Do not call this method or, even better, use SphinxQL instead of an API',
-            E_USER_DEPRECATED
-        );
-        assert(
-            $mode == SPH_MATCH_ALL ||
-            $mode == SPH_MATCH_ANY ||
-            $mode == SPH_MATCH_PHRASE ||
-            $mode == SPH_MATCH_BOOLEAN ||
-            $mode == SPH_MATCH_EXTENDED ||
-            $mode == SPH_MATCH_FULLSCAN ||
-            $mode == SPH_MATCH_EXTENDED2
-        );
-        $this->mode = $mode;
-    }
-
-    /// set ranking mode
-    public function setRankingMode($ranker, $rankexpr='')
-    {
-        assert($ranker === 0 || $ranker >= 1 && $ranker < SPH_RANK_TOTAL);
-        assert(is_string($rankexpr));
-        $this->ranker = $ranker;
-        $this->rank_expr = $rankexpr;
-    }
-
-    /// set matches sorting mode
-    public function setSortMode($mode, $sortby = '')
-    {
-        assert (
-            $mode == SPH_SORT_RELEVANCE ||
-            $mode == SPH_SORT_ATTR_DESC ||
-            $mode == SPH_SORT_ATTR_ASC ||
-            $mode == SPH_SORT_TIME_SEGMENTS ||
-            $mode == SPH_SORT_EXTENDED ||
-            $mode == SPH_SORT_EXPR
-        );
-        assert(is_string($sortby));
-        assert($mode == SPH_SORT_RELEVANCE || strlen($sortby) > 0);
-
-        $this->sort = $mode;
-        $this->sort_by = $sortby;
-    }
-
-    /**
-     * Bind per-field weights by order
-     *
-     * @deprecated use setFieldWeights() instead
-     */
-    public function setWeights()
-    {
-        throw new \RuntimeException('This method is now deprecated; please use setFieldWeights instead');
-    }
-
-    /// bind per-field weights by name
-    public function setFieldWeights($weights)
-    {
-        assert(is_array($weights));
-        foreach ($weights as $name => $weight) {
-            assert(is_string($name));
-            assert(is_int($weight));
-        }
-        $this->field_weights = $weights;
-    }
-
-    /// bind per-index weights by name
-    public function setIndexWeights($weights)
-    {
-        assert(is_array($weights));
-        foreach ($weights as $index => $weight) {
-            assert(is_string($index));
-            assert(is_int($weight));
-        }
-        $this->index_weights = $weights;
-    }
-
-    /// set IDs range to match
-    /// only match records if document ID is beetwen $min and $max (inclusive)
-    public function setIDRange($min, $max)
-    {
-        assert(is_numeric($min));
-        assert(is_numeric($max));
-        assert($min <= $max);
-        $this->min_id = $min;
-        $this->max_id = $max;
-    }
-
-    /// set values set filter
-    /// only match records where $attribute value is in given set
-    public function setFilter($attribute, $values, $exclude = false)
-    {
-        assert(is_string($attribute));
-        assert(is_array($values));
-        assert(count($values));
-
-        if (is_array($values) && count($values)) {
-            foreach ($values as $value) {
-                assert(is_numeric($value));
-            }
-
-            $this->filters[] = array(
-                'type' => SPH_FILTER_VALUES,
-                'attr' => $attribute,
-                'exclude' => $exclude,
-                'values' => $values
-            );
-        }
-    }
-
-    /// set string filter
-    /// only match records where $attribute value is equal
-    public function setFilterString($attribute, $value, $exclude = false)
-    {
-        assert(is_string($attribute));
-        assert(is_string($value));
-        $this->filters[] = array(
-            'type' => SPH_FILTER_STRING,
-            'attr' => $attribute,
-            'exclude' => $exclude,
-            'value' => $value
-        );
-    }    
-
-    /// set range filter
-    /// only match records if $attribute value is beetwen $min and $max (inclusive)
-    public function setFilterRange($attribute, $min, $max, $exclude = false)
-    {
-        assert(is_string($attribute));
-        assert(is_numeric($min));
-        assert(is_numeric($max));
-        assert($min <= $max);
-
-        $this->filters[] = array(
-            'type' => SPH_FILTER_RANGE,
-            'attr' => $attribute,
-            'exclude' => $exclude,
-            'min' => $min,
-            'max' => $max
-        );
-    }
-
-    /// set float range filter
-    /// only match records if $attribute value is beetwen $min and $max (inclusive)
-    public function setFilterFloatRange($attribute, $min, $max, $exclude = false)
-    {
-        assert(is_string($attribute));
-        assert(is_float($min));
-        assert(is_float($max));
-        assert($min <= $max);
-
-        $this->filters[] = array(
-            'type' => SPH_FILTER_FLOATRANGE,
-            'attr' => $attribute,
-            'exclude' => $exclude,
-            'min' => $min,
-            'max' => $max
-        );
-    }
-
-    /// setup anchor point for geosphere distance calculations
-    /// required to use @geodist in filters and sorting
-    /// latitude and longitude must be in radians
-    public function setGeoAnchor($attrlat, $attrlong, $lat, $long)
-    {
-        assert(is_string($attrlat));
-        assert(is_string($attrlong));
-        assert(is_float($lat));
-        assert(is_float($long));
-
-        $this->anchor = array(
-            'attrlat' => $attrlat,
-            'attrlong' => $attrlong,
-            'lat' => $lat,
-            'long' => $long
-        );
-    }
-
-    /// set grouping attribute and function
-    public function setGroupBy($attribute, $func, $groupsort = '@group desc')
-    {
-        assert(is_string($attribute));
-        assert(is_string($groupsort));
-        assert(
-            $func == SPH_GROUPBY_DAY ||
-            $func == SPH_GROUPBY_WEEK ||
-            $func == SPH_GROUPBY_MONTH ||
-            $func == SPH_GROUPBY_YEAR ||
-            $func == SPH_GROUPBY_ATTR ||
-            $func == SPH_GROUPBY_ATTRPAIR
-        );
-
-        $this->group_by = $attribute;
-        $this->group_func = $func;
-        $this->group_sort = $groupsort;
-    }
-
-    /// set count-distinct attribute for group-by queries
-    public function setGroupDistinct($attribute)
-    {
-        assert(is_string($attribute));
-        $this->group_distinct = $attribute;
-    }
-
-    /// set distributed retries count and delay
-    public function setRetries($count, $delay = 0)
-    {
-        assert(is_int($count) && $count >= 0);
-        assert(is_int($delay) && $delay >= 0);
-        $this->retry_count = $count;
-        $this->retry_delay = $delay;
-    }
-
-    /// set result set format (hash or array; hash by default)
-    /// PHP specific; needed for group-by-MVA result sets that may contain duplicate IDs
-    public function setArrayResult($arrayresult)
-    {
-        assert(is_bool($arrayresult));
-        $this->array_result = $arrayresult;
-    }
-
-    /// set attribute values override
-    /// there can be only one override per attribute
-    /// $values must be a hash that maps document IDs to attribute values
-    public function setOverride($attrname, $attrtype, $values)
-    {
-        trigger_error(
-            'DEPRECATED: Do not call this method. Use SphinxQL REMAP() function instead.',
-            E_USER_DEPRECATED
-        );
-        assert(is_string($attrname));
-        assert(in_array($attrtype, array(
-            SPH_ATTR_INTEGER,
-            SPH_ATTR_TIMESTAMP,
-            SPH_ATTR_BOOL,
-            SPH_ATTR_FLOAT,
-            SPH_ATTR_BIGINT
-        )));
-        assert(is_array($values));
-
-        $this->overrides[$attrname] = array(
-            'attr' => $attrname,
-            'type' => $attrtype,
-            'values' => $values
-        );
-    }
-
-    /// set select-list (attributes or expressions), SQL-like syntax
-    public function setSelect($select)
-    {
-        assert(is_string($select));
-        $this->select = $select;
-    }
-
-    public function setQueryFlag($flag_name, $flag_value)
-    {
-        $known_names = array(
-            'reverse_scan',
-            'sort_method',
-            'max_predicted_time',
-            'boolean_simplify',
-            'idf',
-            'global_idf',
-            'low_priority'
-        );
-        $flags = array (
-            'reverse_scan' => array(0, 1),
-            'sort_method' => array('pq', 'kbuffer'),
-            'max_predicted_time' => array(0),
-            'boolean_simplify' => array(true, false),
-            'idf' => array ('normalized', 'plain', 'tfidf_normalized', 'tfidf_unnormalized'),
-            'global_idf' => array(true, false),
-            'low_priority' => array(true, false)
-        );
-
-        assert(isset($flag_name, $known_names));
-        assert(
-            in_array($flag_value, $flags[$flag_name], true) ||
-            ($flag_name == 'max_predicted_time' && is_int($flag_value) && $flag_value >= 0)
-        );
-
-        if ($flag_name == 'reverse_scan') {
-            $this->query_flags = sphSetBit($this->query_flags, 0, $flag_value == 1);
-        }
-        if ($flag_name == 'sort_method') {
-            $this->query_flags = sphSetBit($this->query_flags, 1, $flag_value == 'kbuffer');
-        }
-        if ($flag_name == 'max_predicted_time') {
-            $this->query_flags = sphSetBit($this->query_flags, 2, $flag_value > 0);
-            $this->predicted_time = (int)$flag_value;
-        }
-        if ($flag_name == 'boolean_simplify') {
-            $this->query_flags = sphSetBit($this->query_flags, 3, $flag_value);
-        }
-        if ($flag_name == 'idf' && ($flag_value == 'normalized' || $flag_value == 'plain')) {
-            $this->query_flags = sphSetBit($this->query_flags, 4, $flag_value == 'plain');
-        }
-        if ($flag_name == 'global_idf') {
-            $this->query_flags = sphSetBit($this->query_flags, 5, $flag_value);
-        }
-        if ($flag_name == 'idf' && ($flag_value == 'tfidf_normalized' || $flag_value == 'tfidf_unnormalized')) {
-            $this->query_flags = sphSetBit($this->query_flags, 6, $flag_value == 'tfidf_normalized');
-        }
-        if ($flag_name == 'low_priority') {
-            $this->query_flags = sphSetBit($this->query_flags, 8, $flag_value);
-        }
-    }
-
-    /// set outer order by parameters
-    public function setOuterSelect($orderby, $offset, $limit)
-    {
-        assert(is_string($orderby));
-        assert(is_int($offset));
-        assert(is_int($limit));
-        assert($offset >= 0);
-        assert($limit > 0);
-
-        $this->outer_order_by = $orderby;
-        $this->outer_offset = $offset;
-        $this->outer_limit = $limit;
-        $this->has_outer = true;
-    }
-
-
-    //////////////////////////////////////////////////////////////////////////////
-
-    /// clear all filters (for multi-queries)
-    public function resetFilters()
-    {
-        $this->filters = array();
-        $this->anchor = array();
-    }
-
-    /// clear groupby settings (for multi-queries)
-    public function resetGroupBy()
-    {
-        $this->group_by = '';
-        $this->group_func = SPH_GROUPBY_DAY;
-        $this->group_sort = '@group desc';
-        $this->group_distinct = '';
-    }
-
-    /// clear all attribute value overrides (for multi-queries)
-    public function resetOverrides()
-    {
-        $this->overrides = array();
-    }
-
-    public function resetQueryFlag()
-    {
-        $this->query_flags = sphSetBit(0, 6, true); // default idf=tfidf_normalized
-        $this->predicted_time = 0;
-    }
-
-    public function resetOuterSelect()
-    {
-        $this->outer_order_by = '';
-        $this->outer_offset = 0;
-        $this->outer_limit = 0;
-        $this->has_outer = false;
-    }
-
-    //////////////////////////////////////////////////////////////////////////////
-
-    /// connect to searchd server, run given search query through given indexes,
-    /// and return the search results
-    public function query($query, $index = '*', $comment = '')
-    {
-        assert(empty($this->reqs));
-
-        $this->addQuery($query, $index, $comment);
-        $results = $this->runQueries();
-        $this->reqs = array(); // just in case it failed too early
-
-        if (!is_array($results)) {
-            return false; // probably network error; error message should be already filled
-        }
-
-        $this->error = $results[0]['error'];
-        $this->warning = $results[0]['warning'];
-        if ($results[0]['status'] == SEARCHD_ERROR) {
-            return false;
-        } else {
-            return $results[0];
-        }
-    }
-
-    /// helper to pack floats in network byte order
-    protected function packFloat($f)
-    {
-        $t1 = pack('f', $f); // machine order
-        list(, $t2) = unpack('L*', $t1); // int in machine order
-        return pack('N', $t2);
-    }
-
-    /// add query to multi-query batch
-    /// returns index into results array from RunQueries() call
-    public function addQuery($query, $index = '*', $comment = '')
-    {
-        // mbstring workaround
-        $this->mbPush();
-
-        // build request
-        $req = pack('NNNNN', $this->query_flags, $this->offset, $this->limit, $this->mode, $this->ranker);
-        if ($this->ranker == SPH_RANK_EXPR) {
-            $req .= pack('N', strlen($this->rank_expr)) . $this->rank_expr;
-        }
-        $req .= pack('N', $this->sort); // (deprecated) sort mode
-        $req .= pack('N', strlen($this->sort_by)) . $this->sort_by;
-        $req .= pack('N', strlen($query)) . $query; // query itself
-        $req .= pack('N', count($this->weights)); // weights
-        foreach ($this->weights as $weight) {
-            $req .= pack('N', (int)$weight);
-        }
-        $req .= pack('N', strlen($index)) . $index; // indexes
-        $req .= pack('N', 1); // id64 range marker
-        $req .= sphPackU64($this->min_id) . sphPackU64($this->max_id); // id64 range
-
-        // filters
-        $req .= pack('N', count($this->filters));
-        foreach ($this->filters as $filter) {
-            $req .= pack('N', strlen($filter['attr'])) . $filter['attr'];
-            $req .= pack('N', $filter['type']);
-            switch ($filter['type']) {
-                case SPH_FILTER_VALUES:
-                    $req .= pack('N', count($filter['values']));
-                    foreach ($filter['values'] as $value) {
-                        $req .= sphPackI64($value);
-                    }
-                    break;
-                case SPH_FILTER_RANGE:
-                    $req .= sphPackI64($filter['min']) . sphPackI64($filter['max']);
-                    break;
-                case SPH_FILTER_FLOATRANGE:
-                    $req .= $this->packFloat($filter['min']) . $this->packFloat($filter['max']);
-                    break;
-                case SPH_FILTER_STRING:
-                    $req .= pack('N', strlen($filter['value'])) . $filter['value'];
-                    break;
-                default:
-                    assert(0 && 'internal error: unhandled filter type');
-            }
-            $req .= pack('N', $filter['exclude']);
-        }
-
-        // group-by clause, max-matches count, group-sort clause, cutoff count
-        $req .= pack('NN', $this->group_func, strlen($this->group_by)) . $this->group_by;
-        $req .= pack('N', $this->max_matches);
-        $req .= pack('N', strlen($this->group_sort)) . $this->group_sort;
-        $req .= pack('NNN', $this->cutoff, $this->retry_count, $this->retry_delay);
-        $req .= pack('N', strlen($this->group_distinct)) . $this->group_distinct;
-
-        // anchor point
-        if (empty($this->anchor)) {
-            $req .= pack('N', 0);
-        } else {
-            $a =& $this->anchor;
-            $req .= pack('N', 1);
-            $req .= pack('N', strlen($a['attrlat'])) . $a['attrlat'];
-            $req .= pack('N', strlen($a['attrlong'])) . $a['attrlong'];
-            $req .= $this->packFloat($a['lat']) . $this->packFloat($a['long']);
-        }
-
-        // per-index weights
-        $req .= pack('N', count($this->index_weights));
-        foreach ($this->index_weights as $idx => $weight) {
-            $req .= pack('N', strlen($idx)) . $idx . pack('N', $weight);
-        }
-
-        // max query time
-        $req .= pack('N', $this->max_query_time);
-
-        // per-field weights
-        $req .= pack('N', count($this->field_weights));
-        foreach ($this->field_weights as $field => $weight) {
-            $req .= pack('N', strlen($field)) . $field . pack('N', $weight);
-        }
-
-        // comment
-        $req .= pack('N', strlen($comment)) . $comment;
-
-        // attribute overrides
-        $req .= pack('N', count($this->overrides));
-        foreach ($this->overrides as $key => $entry) {
-            $req .= pack('N', strlen($entry['attr'])) . $entry['attr'];
-            $req .= pack('NN', $entry['type'], count($entry['values']));
-            foreach ($entry['values'] as $id => $val) {
-                assert(is_numeric($id));
-                assert(is_numeric($val));
-
-                $req .= sphPackU64($id);
-                switch ($entry['type']) {
-                    case SPH_ATTR_FLOAT:
-                        $req .= $this->packFloat($val);
-                        break;
-                    case SPH_ATTR_BIGINT:
-                        $req .= sphPackI64($val);
-                        break;
-                    default:
-                        $req .= pack('N', $val);
-                        break;
-                }
-            }
-        }
-
-        // select-list
-        $req .= pack('N', strlen($this->select)) . $this->select;
-
-        // max_predicted_time
-        if ($this->predicted_time > 0) {
-            $req .= pack('N', (int)$this->predicted_time);
-        }
-
-        $req .= pack('N', strlen($this->outer_order_by)) . $this->outer_order_by;
-        $req .= pack('NN', $this->outer_offset, $this->outer_limit);
-        if ($this->has_outer) {
-            $req .= pack('N', 1);
-        } else {
-            $req .= pack('N', 0);
-        }
-
-        // mbstring workaround
-        $this->mbPop();
-
-        // store request to requests array
-        $this->reqs[] = $req;
-        return count($this->reqs) - 1;
-    }
-
-    /// connect to searchd, run queries batch, and return an array of result sets
-    public function runQueries()
-    {
-        if (empty($this->reqs)) {
-            $this->error = 'no queries defined, issue AddQuery() first';
-            return false;
-        }
-
-        // mbstring workaround
-        $this->mbPush();
-
-        if (!($fp = $this->connect())) {
-            $this->mbPop();
-            return false;
-        }
-
-        // send query, get response
-        $nreqs = count($this->reqs);
-        $req = join('', $this->reqs);
-        $len = 8 + strlen($req);
-        $req = pack('nnNNN', SEARCHD_COMMAND_SEARCH, VER_COMMAND_SEARCH, $len, 0, $nreqs) . $req; // add header
-
-        if (!$this->send($fp, $req, $len + 8) || !($response = $this->getResponse($fp, VER_COMMAND_SEARCH))) {
-            $this->mbPop();
-            return false;
-        }
-
-        // query sent ok; we can reset reqs now
-        $this->reqs = array();
-
-        // parse and return response
-        return $this->parseSearchResponse($response, $nreqs);
-    }
-
-    /// parse and return search query (or queries) response
-    protected function parseSearchResponse($response, $nreqs)
-    {
-        $p = 0; // current position
-        $max = strlen($response); // max position for checks, to protect against broken responses
-
-        $results = array();
-        for ($ires = 0; $ires < $nreqs && $p < $max; $ires++) {
-            $results[] = array();
-            $result =& $results[$ires];
-
-            $result['error'] = '';
-            $result['warning'] = '';
-
-            // extract status
-            list(, $status) = unpack('N*', substr($response, $p, 4));
-            $p += 4;
-            $result['status'] = $status;
-            if ($status != SEARCHD_OK) {
-                list(, $len) = unpack('N*', substr($response, $p, 4));
-                $p += 4;
-                $message = substr($response, $p, $len);
-                $p += $len;
-
-                if ($status == SEARCHD_WARNING) {
-                    $result['warning'] = $message;
-                } else {
-                    $result['error'] = $message;
-                    continue;
-                }
-            }
-
-            // read schema
-            $fields = array();
-            $attrs = array();
-
-            list(, $nfields) = unpack('N*', substr($response, $p, 4));
-            $p += 4;
-            while ($nfields --> 0 && $p < $max) {
-                list(, $len) = unpack('N*', substr($response, $p, 4));
-                $p += 4;
-                $fields[] = substr($response, $p, $len);
-                $p += $len;
-            }
-            $result['fields'] = $fields;
-
-            list(, $nattrs) = unpack('N*', substr($response, $p, 4));
-            $p += 4;
-            while ($nattrs --> 0 && $p < $max) {
-                list(, $len) = unpack('N*', substr($response, $p, 4));
-                $p += 4;
-                $attr = substr($response, $p, $len);
-                $p += $len;
-                list(, $type) = unpack('N*', substr($response, $p, 4));
-                $p += 4;
-                $attrs[$attr] = $type;
-            }
-            $result['attrs'] = $attrs;
-
-            // read match count
-            list(, $count) = unpack('N*', substr($response, $p, 4));
-            $p += 4;
-            list(, $id64) = unpack('N*', substr($response, $p, 4));
-            $p += 4;
-
-            // read matches
-            $idx = -1;
-            while ($count --> 0 && $p < $max) {
-                // index into result array
-                $idx++;
-
-                // parse document id and weight
-                if ($id64) {
-                    $doc = sphUnpackU64(substr($response, $p, 8));
-                    $p += 8;
-                    list(,$weight) = unpack('N*', substr($response, $p, 4));
-                    $p += 4;
-                } else {
-                    list($doc, $weight) = array_values(unpack('N*N*', substr($response, $p, 8)));
-                    $p += 8;
-                    $doc = sphFixUint($doc);
-                }
-                $weight = sprintf('%u', $weight);
-
-                // create match entry
-                if ($this->array_result) {
-                    $result['matches'][$idx] = array('id' => $doc, 'weight' => $weight);
-                } else {
-                    $result['matches'][$doc]['weight'] = $weight;
-                }
-
-                // parse and create attributes
-                $attrvals = array();
-                foreach ($attrs as $attr => $type) {
-                    // handle 64bit ints
-                    if ($type == SPH_ATTR_BIGINT) {
-                        $attrvals[$attr] = sphUnpackI64(substr($response, $p, 8));
-                        $p += 8;
-                        continue;
-                    }
-
-                    // handle floats
-                    if ($type == SPH_ATTR_FLOAT) {
-                        list(, $uval) = unpack('N*', substr($response, $p, 4));
-                        $p += 4;
-                        list(, $fval) = unpack('f*', pack('L', $uval));
-                        $attrvals[$attr] = $fval;
-                        continue;
-                    }
-
-                    // handle everything else as unsigned ints
-                    list(, $val) = unpack('N*', substr($response, $p, 4));
-                    $p += 4;
-                    if ($type == SPH_ATTR_MULTI) {
-                        $attrvals[$attr] = array();
-                        $nvalues = $val;
-                        while ($nvalues --> 0 && $p < $max) {
-                            list(, $val) = unpack('N*', substr($response, $p, 4));
-                            $p += 4;
-                            $attrvals[$attr][] = sphFixUint($val);
-                        }
-                    } elseif ($type == SPH_ATTR_MULTI64) {
-                        $attrvals[$attr] = array();
-                        $nvalues = $val;
-                        while ($nvalues > 0 && $p < $max) {
-                            $attrvals[$attr][] = sphUnpackI64(substr($response, $p, 8));
-                            $p += 8;
-                            $nvalues -= 2;
-                        }
-                    } elseif ($type == SPH_ATTR_STRING) {
-                        $attrvals[$attr] = substr($response, $p, $val);
-                        $p += $val;
-                    } elseif ($type == SPH_ATTR_FACTORS) {
-                        $attrvals[$attr] = substr($response, $p, $val - 4);
-                        $p += $val-4;
-                    } else {
-                        $attrvals[$attr] = sphFixUint($val);
-                    }
-                }
-
-                if ($this->array_result) {
-                    $result['matches'][$idx]['attrs'] = $attrvals;
-                } else {
-                    $result['matches'][$doc]['attrs'] = $attrvals;
-                }
-            }
-
-            list($total, $total_found, $msecs, $words) = array_values(unpack('N*N*N*N*', substr($response, $p, 16)));
-            $result['total'] = sprintf('%u', $total);
-            $result['total_found'] = sprintf('%u', $total_found);
-            $result['time'] = sprintf('%.3f', $msecs / 1000);
-            $p += 16;
-
-            while ($words --> 0 && $p < $max) {
-                list(, $len) = unpack('N*', substr($response, $p, 4));
-                $p += 4;
-                $word = substr($response, $p, $len);
-                $p += $len;
-                list($docs, $hits) = array_values(unpack('N*N*', substr($response, $p, 8)));
-                $p += 8;
-                $result['words'][$word] = array (
-                    'docs' => sprintf('%u', $docs),
-                    'hits' => sprintf('%u', $hits)
-                );
-            }
-        }
-
-        $this->mbPop();
-        return $results;
-    }
-
-    /////////////////////////////////////////////////////////////////////////////
-    // excerpts generation
-    /////////////////////////////////////////////////////////////////////////////
-
-    /// connect to searchd server, and generate exceprts (snippets)
-    /// of given documents for given query. returns false on failure,
-    /// an array of snippets on success
-    public function buildExcerpts($docs, $index, $words, $opts = array())
-    {
-        assert(is_array($docs));
-        assert(is_string($index));
-        assert(is_string($words));
-        assert(is_array($opts));
-
-        $this->mbPush();
-
-        if (!($fp = $this->connect())) {
-            $this->mbPop();
-            return false;
-        }
-
-        /////////////////
-        // fixup options
-        /////////////////
-
-        if (!isset($opts['before_match'])) {
-            $opts['before_match'] = '<b>';
-        }
-        if (!isset($opts['after_match'])) {
-            $opts['after_match'] = '</b>';
-        }
-        if (!isset($opts['chunk_separator'])) {
-            $opts['chunk_separator'] = ' ... ';
-        }
-        if (!isset($opts['limit'])) {
-            $opts['limit'] = 256;
-        }
-        if (!isset($opts['limit_passages'])) {
-            $opts['limit_passages'] = 0;
-        }
-        if (!isset($opts['limit_words'])) {
-            $opts['limit_words'] = 0;
-        }
-        if (!isset($opts['around'])) {
-            $opts['around'] = 5;
-        }
-        if (!isset($opts['exact_phrase'])) {
-            $opts['exact_phrase'] = false;
-        }
-        if (!isset($opts['single_passage'])) {
-            $opts['single_passage'] = false;
-        }
-        if (!isset($opts['use_boundaries'])) {
-            $opts['use_boundaries'] = false;
-        }
-        if (!isset($opts['weight_order'])) {
-            $opts['weight_order'] = false;
-        }
-        if (!isset($opts['query_mode'])) {
-            $opts['query_mode'] = false;
-        }
-        if (!isset($opts['force_all_words'])) {
-            $opts['force_all_words'] = false;
-        }
-        if (!isset($opts['start_passage_id'])) {
-            $opts['start_passage_id'] = 1;
-        }
-        if (!isset($opts['load_files'])) {
-            $opts['load_files'] = false;
-        }
-        if (!isset($opts['html_strip_mode'])) {
-            $opts['html_strip_mode'] = 'index';
-        }
-        if (!isset($opts['allow_empty'])) {
-            $opts['allow_empty'] = false;
-        }
-        if (!isset($opts['passage_boundary'])) {
-            $opts['passage_boundary'] = 'none';
-        }
-        if (!isset($opts['emit_zones'])) {
-            $opts['emit_zones'] = false;
-        }
-        if (!isset($opts['load_files_scattered'])) {
-            $opts['load_files_scattered'] = false;
-        }
-
-
-        /////////////////
-        // build request
-        /////////////////
-
-        // v.1.2 req
-        $flags = 1; // remove spaces
-        if ($opts['exact_phrase']) {
-            $flags |= 2;
-        }
-        if ($opts['single_passage']) {
-            $flags |= 4;
-        }
-        if ($opts['use_boundaries']) {
-            $flags |= 8;
-        }
-        if ($opts['weight_order']) {
-            $flags |= 16;
-        }
-        if ($opts['query_mode']) {
-            $flags |= 32;
-        }
-        if ($opts['force_all_words']) {
-            $flags |= 64;
-        }
-        if ($opts['load_files']) {
-            $flags |= 128;
-        }
-        if ($opts['allow_empty']) {
-            $flags |= 256;
-        }
-        if ($opts['emit_zones']) {
-            $flags |= 512;
-        }
-        if ($opts['load_files_scattered']) {
-            $flags |= 1024;
-        }
-        $req = pack('NN', 0, $flags); // mode=0, flags=$flags
-        $req .= pack('N', strlen($index)) . $index; // req index
-        $req .= pack('N', strlen($words)) . $words; // req words
-
-        // options
-        $req .= pack('N', strlen($opts['before_match'])) . $opts['before_match'];
-        $req .= pack('N', strlen($opts['after_match'])) . $opts['after_match'];
-        $req .= pack('N', strlen($opts['chunk_separator'])) . $opts['chunk_separator'];
-        $req .= pack('NN', (int)$opts['limit'], (int)$opts['around']);
-        $req .= pack('NNN', (int)$opts['limit_passages'], (int)$opts['limit_words'], (int)$opts['start_passage_id']); // v.1.2
-        $req .= pack('N', strlen($opts['html_strip_mode'])) . $opts['html_strip_mode'];
-        $req .= pack('N', strlen($opts['passage_boundary'])) . $opts['passage_boundary'];
-
-        // documents
-        $req .= pack('N', count($docs));
-        foreach ($docs as $doc) {
-            assert(is_string($doc));
-            $req .= pack('N', strlen($doc)) . $doc;
-        }
-
-        ////////////////////////////
-        // send query, get response
-        ////////////////////////////
-
-        $len = strlen($req);
-        $req = pack('nnN', SEARCHD_COMMAND_EXCERPT, VER_COMMAND_EXCERPT, $len) . $req; // add header
-        if (!$this->send($fp, $req, $len + 8) || !($response = $this->getResponse($fp, VER_COMMAND_EXCERPT))) {
-            $this->mbPop();
-            return false;
-        }
-
-        //////////////////
-        // parse response
-        //////////////////
-
-        $pos = 0;
-        $res = array();
-        $rlen = strlen($response);
-        $count = count($docs);
-        while ($count--) {
-            list(, $len) = unpack('N*', substr($response, $pos, 4));
-            $pos += 4;
-
-            if ($pos + $len > $rlen) {
-                $this->error = 'incomplete reply';
-                $this->mbPop();
-                return false;
-            }
-            $res[] = $len ? substr($response, $pos, $len) : '';
-            $pos += $len;
-        }
-
-        $this->mbPop();
-        return $res;
-    }
-
-
-    /////////////////////////////////////////////////////////////////////////////
-    // keyword generation
-    /////////////////////////////////////////////////////////////////////////////
-
-    /// connect to searchd server, and generate keyword list for a given query
-    /// returns false on failure,
-    /// an array of words on success
-    public function buildKeywords($query, $index, $hits)
-    {
-        assert(is_string($query));
-        assert(is_string($index));
-        assert(is_bool($hits));
-
-        $this->mbPush();
-
-        if (!($fp = $this->connect())) {
-            $this->mbPop();
-            return false;
-        }
-
-        /////////////////
-        // build request
-        /////////////////
-
-        // v.1.0 req
-        $req  = pack('N', strlen($query)) . $query; // req query
-        $req .= pack('N', strlen($index)) . $index; // req index
-        $req .= pack('N', (int)$hits);
-
-        ////////////////////////////
-        // send query, get response
-        ////////////////////////////
-
-        $len = strlen($req);
-        $req = pack('nnN', SEARCHD_COMMAND_KEYWORDS, VER_COMMAND_KEYWORDS, $len) . $req; // add header
-        if (!$this->send($fp, $req, $len + 8) || !($response = $this->getResponse($fp, VER_COMMAND_KEYWORDS))) {
-            $this->mbPop();
-            return false;
-        }
-
-        //////////////////
-        // parse response
-        //////////////////
-
-        $pos = 0;
-        $res = array();
-        $rlen = strlen($response);
-        list(, $nwords) = unpack('N*', substr($response, $pos, 4));
-        $pos += 4;
-        for ($i = 0; $i < $nwords; $i++) {
-            list(, $len) = unpack('N*', substr($response, $pos, 4));
-            $pos += 4;
-            $tokenized = $len ? substr($response, $pos, $len) : '';
-            $pos += $len;
-
-            list(, $len) = unpack('N*', substr($response, $pos, 4));
-            $pos += 4;
-            $normalized = $len ? substr($response, $pos, $len) : '';
-            $pos += $len;
-
-            $res[] = array(
-                'tokenized' => $tokenized,
-                'normalized' => $normalized
-            );
-
-            if ($hits) {
-                list($ndocs, $nhits) = array_values(unpack('N*N*', substr($response, $pos, 8)));
-                $pos += 8;
-                $res[$i]['docs'] = $ndocs;
-                $res[$i]['hits'] = $nhits;
-            }
-
-            if ($pos > $rlen) {
-                $this->error = 'incomplete reply';
-                $this->mbPop();
-                return false;
-            }
-        }
-
-        $this->mbPop();
-        return $res;
-    }
-
-    public function escapeString($string)
-    {
-        $from = array('\\', '(',')','|','-','!','@','~','"','&', '/', '^', '$', '=', '<');
-        $to   = array('\\\\', '\(','\)','\|','\-','\!','\@','\~','\"', '\&', '\/', '\^', '\$', '\=', '\<');
-
-        return str_replace($from, $to, $string);
-    }
-
-    /////////////////////////////////////////////////////////////////////////////
-    // attribute updates
-    /////////////////////////////////////////////////////////////////////////////
-
-    /// batch update given attributes in given rows in given indexes
-    /// returns amount of updated documents (0 or more) on success, or -1 on failure
-    public function updateAttributes($index, $attrs, $values, $mva = false, $ignorenonexistent = false)
-    {
-        // verify everything
-        assert(is_string($index));
-        assert(is_bool($mva));
-        assert(is_bool($ignorenonexistent));
-
-        assert(is_array($attrs));
-        foreach ($attrs as $attr) {
-            assert(is_string($attr));
-        }
-
-        assert(is_array($values));
-        foreach ($values as $id => $entry) {
-            assert(is_numeric($id));
-            assert(is_array($entry));
-            assert(count($entry) == count($attrs));
-            foreach ($entry as $v) {
-                if ($mva) {
-                    assert(is_array($v));
-                    foreach ($v as $vv) {
-                        assert(is_int($vv));
-                    }
-                } else {
-                    assert(is_int($v));
-                }
-            }
-        }
-
-        // build request
-        $this->mbPush();
-        $req = pack('N', strlen($index)) . $index;
-
-        $req .= pack('N', count($attrs));
-        $req .= pack('N', $ignorenonexistent ? 1 : 0);
-        foreach ($attrs as $attr) {
-            $req .= pack('N', strlen($attr)) . $attr;
-            $req .= pack('N', $mva ? 1 : 0);
-        }
-
-        $req .= pack('N', count($values));
-        foreach ($values as $id => $entry) {
-            $req .= sphPackU64($id);
-            foreach ($entry as $v) {
-                $req .= pack('N', $mva ? count($v) : $v);
-                if ($mva) {
-                    foreach ($v as $vv) {
-                        $req .= pack('N', $vv);
-                    }
-                }
-            }
-        }
-
-        // connect, send query, get response
-        if (!($fp = $this->connect())) {
-            $this->mbPop();
-            return -1;
-        }
-
-        $len = strlen($req);
-        $req = pack('nnN', SEARCHD_COMMAND_UPDATE, VER_COMMAND_UPDATE, $len) . $req; // add header
-        if (!$this->send($fp, $req, $len + 8)) {
-            $this->mbPop();
-            return -1;
-        }
-
-        if (!($response = $this->getResponse($fp, VER_COMMAND_UPDATE))) {
-            $this->mbPop();
-            return -1;
-        }
-
-        // parse response
-        list(, $updated) = unpack('N*', substr($response, 0, 4));
-        $this->mbPop();
-        return $updated;
-    }
-
-    /////////////////////////////////////////////////////////////////////////////
-    // persistent connections
-    /////////////////////////////////////////////////////////////////////////////
-
-    public function open()
-    {
-        if ($this->socket !== false) {
-            $this->error = 'already connected';
-            return false;
-        }
-        if (!($fp = $this->connect()))
-            return false;
-
-        // command, command version = 0, body length = 4, body = 1
-        $req = pack('nnNN', SEARCHD_COMMAND_PERSIST, 0, 4, 1);
-        if (!$this->send($fp, $req, 12)) {
-            return false;
-        }
-
-        $this->socket = $fp;
-        return true;
-    }
-
-    public function close()
-    {
-        if ($this->socket === false) {
-            $this->error = 'not connected';
-            return false;
-        }
-
-        fclose($this->socket);
-        $this->socket = false;
-
-        return true;
-    }
-
-    //////////////////////////////////////////////////////////////////////////
-    // status
-    //////////////////////////////////////////////////////////////////////////
-
-    public function status($session = false)
-    {
-        assert(is_bool($session));
-
-        $this->mbPush();
-        if (!($fp = $this->connect())) {
-            $this->mbPop();
-            return false;
-        }
-
-        $req = pack('nnNN', SEARCHD_COMMAND_STATUS, VER_COMMAND_STATUS, 4, $session ? 0 : 1); // len=4, body=1
-        if (!$this->send($fp, $req, 12) || !($response = $this->getResponse($fp, VER_COMMAND_STATUS))) {
-            $this->mbPop();
-            return false;
-        }
-
-        $res = substr($response, 4); // just ignore length, error handling, etc
-        $p = 0;
-        list($rows, $cols) = array_values(unpack('N*N*', substr($response, $p, 8)));
-        $p += 8;
-
-        $res = array();
-        for ($i = 0; $i < $rows; $i++) {
-            for ($j = 0; $j < $cols; $j++) {
-                list(, $len) = unpack('N*', substr($response, $p, 4));
-                $p += 4;
-                $res[$i][] = substr($response, $p, $len);
-                $p += $len;
-            }
-        }
-
-        $this->mbPop();
-        return $res;
-    }
-
-    //////////////////////////////////////////////////////////////////////////
-    // flush
-    //////////////////////////////////////////////////////////////////////////
-
-    public function flushAttributes()
-    {
-        $this->mbPush();
-        if (!($fp = $this->connect())) {
-            $this->mbPop();
-            return -1;
-        }
-
-        $req = pack('nnN', SEARCHD_COMMAND_FLUSHATTRS, VER_COMMAND_FLUSHATTRS, 0); // len=0
-        if (!$this->send($fp, $req, 8) || !($response = $this->getResponse($fp, VER_COMMAND_FLUSHATTRS))) {
-            $this->mbPop();
-            return -1;
-        }
-
-        $tag = -1;
-        if (strlen($response) == 4) {
-            list(, $tag) = unpack('N*', $response);
-        } else {
-            $this->error = 'unexpected response length';
-        }
-
-        $this->mbPop();
-        return $tag;
-    }
+	protected $host = 'localhost'; ///< searchd host (default is 'localhost')
+	protected $port = 9312; ///< searchd port (default is 9312)
+	protected $offset = 0; ///< how many records to seek from result-set start (default is 0)
+	protected $limit = 20; ///< how many records to return from result-set starting at offset (default is 20)
+	protected $mode = SPH_MATCH_EXTENDED2; ///< query matching mode (default is SPH_MATCH_EXTENDED2)
+	protected $weights = array(); ///< per-field weights (default is 1 for all fields)
+	protected $sort = SPH_SORT_RELEVANCE; ///< match sorting mode (default is SPH_SORT_RELEVANCE)
+	protected $sort_by = ''; ///< attribute to sort by (defualt is '')
+	protected $min_id = 0; ///< min ID to match (default is 0, which means no limit)
+	protected $max_id = 0; ///< max ID to match (default is 0, which means no limit)
+	protected $filters = array(); ///< search filters
+	protected $group_by = ''; ///< group-by attribute name
+	protected $group_func = SPH_GROUPBY_DAY; ///< group-by function (to pre-process group-by attribute value with)
+	protected $group_sort = '@group desc'; ///< group-by sorting clause (to sort groups in result set with)
+	protected $group_distinct = ''; ///< group-by count-distinct attribute
+	protected $max_matches = 1000; ///< max matches to retrieve
+	protected $cutoff = 0; ///< cutoff to stop searching at (default is 0)
+	protected $retry_count = 0; ///< distributed retries count
+	protected $retry_delay = 0; ///< distributed retries delay
+	protected $anchor = array(); ///< geographical anchor point
+	protected $index_weights = array(); ///< per-index weights
+	protected $ranker = SPH_RANK_PROXIMITY_BM25; ///< ranking mode (default is SPH_RANK_PROXIMITY_BM25)
+	protected $rank_expr = ''; ///< ranking mode expression (for SPH_RANK_EXPR)
+	protected $max_query_time = 0; ///< max query time, milliseconds (default is 0, do not limit)
+	protected $field_weights = array(); ///< per-field-name weights
+	protected $overrides = array(); ///< per-query attribute values overrides
+	protected $select = '*'; ///< select-list (attributes or expressions, with optional aliases)
+	protected $query_flags = 0; ///< per-query various flags
+	protected $predicted_time = 0; ///< per-query max_predicted_time
+	protected $outer_order_by = ''; ///< outer match sort by
+	protected $outer_offset = 0; ///< outer offset
+	protected $outer_limit = 0; ///< outer limit
+	protected $has_outer = false;
+
+	protected $error = ''; ///< last error message
+	protected $warning = ''; ///< last warning message
+	protected $conn_error = false; ///< connection error vs remote error flag
+
+	protected $reqs = array(); ///< requests array for multi-query
+	protected $mbenc = ''; ///< stored mbstring encoding
+	protected $array_result = false; ///< whether $result['matches'] should be a hash or an array
+	protected $timeout = 0; ///< connect timeout
+
+	protected $path = false;
+	protected $socket = false;
+
+	/////////////////////////////////////////////////////////////////////////////
+	// common stuff
+	/////////////////////////////////////////////////////////////////////////////
+
+	public function __construct()
+	{
+		$this->query_flags = sphSetBit(0, 6, true); // default idf=tfidf_normalized
+	}
+
+	public function __destruct()
+	{
+		if ($this->socket !== false) {
+			fclose($this->socket);
+		}
+	}
+
+	/// get last error message (string)
+	public function getLastError()
+	{
+		return $this->error;
+	}
+
+	/// get last warning message (string)
+	public function getLastWarning()
+	{
+		return $this->warning;
+	}
+
+	/// get last error flag (to tell network connection errors from searchd errors or broken responses)
+	public function isConnectError()
+	{
+		return $this->conn_error;
+	}
+
+	/// set searchd host name (string) and port (integer)
+	public function setServer($host, $port = 0)
+	{
+		assert(is_string($host));
+		if ($host[0] == '/') {
+			$this->path = 'unix://' . $host;
+			return;
+		}
+		if (substr($host, 0, 7) == 'unix://') {
+			$this->path = $host;
+			return;
+		}
+
+		$this->host = $host;
+		$port = intval($port);
+		assert(0 <= $port && $port < 65536);
+		$this->port = $port == 0 ? 9312 : $port;
+		$this->path = '';
+	}
+
+	/// set server connection timeout (0 to remove)
+	public function setConnectTimeout($timeout)
+	{
+		assert(is_numeric($timeout));
+		$this->timeout = $timeout;
+	}
+
+
+	protected function send($handle, $data, $length)
+	{
+		if (feof($handle) || fwrite($handle, $data, $length) !== $length) {
+			$this->error = 'connection unexpectedly closed (timed out?)';
+			$this->conn_error = true;
+			return false;
+		}
+		return true;
+	}
+
+	/////////////////////////////////////////////////////////////////////////////
+
+	/// enter mbstring workaround mode
+	protected function mbPush()
+	{
+		$this->mbenc = '';
+		if (ini_get('mbstring.func_overload') & 2) {
+			$this->mbenc = mb_internal_encoding();
+			mb_internal_encoding('latin1');
+		}
+	}
+
+	/// leave mbstring workaround mode
+	protected function mbPop()
+	{
+		if ($this->mbenc) {
+			mb_internal_encoding($this->mbenc);
+		}
+	}
+
+	/// connect to searchd server
+	protected function connect()
+	{
+		if ($this->socket !== false) {
+			// we are in persistent connection mode, so we have a socket
+			// however, need to check whether it's still alive
+			if (!@feof($this->socket)) {
+				return $this->socket;
+			}
+
+			// force reopen
+			$this->socket = false;
+		}
+
+		$errno = 0;
+		$errstr = '';
+		$this->conn_error = false;
+
+		if ($this->path) {
+			$host = $this->path;
+			$port = 0;
+		} else {
+			$host = $this->host;
+			$port = $this->port;
+		}
+
+		if ($this->timeout <= 0) {
+			$fp = @fsockopen($host, $port, $errno, $errstr);
+		} else {
+			$fp = @fsockopen($host, $port, $errno, $errstr, $this->timeout);
+		}
+
+		if (!$fp) {
+			if ($this->path) {
+				$location = $this->path;
+			} else {
+				$location = "{$this->host}:{$this->port}";
+			}
+
+			$errstr = trim($errstr);
+			$this->error = "connection to $location failed (errno=$errno, msg=$errstr)";
+			$this->conn_error = true;
+			return false;
+		}
+
+		// send my version
+		// this is a subtle part. we must do it before (!) reading back from searchd.
+		// because otherwise under some conditions (reported on FreeBSD for instance)
+		// TCP stack could throttle write-write-read pattern because of Nagle.
+		if (!$this->send($fp, pack('N', 1), 4)) {
+			fclose($fp);
+			$this->error = 'failed to send client protocol version';
+			return false;
+		}
+
+		// check version
+		list(, $v) = unpack('N*', fread($fp, 4));
+		$v = (int)$v;
+		if ($v < 1) {
+			fclose($fp);
+			$this->error = "expected searchd protocol version 1+, got version '$v'";
+			return false;
+		}
+
+		return $fp;
+	}
+
+	/// get and check response packet from searchd server
+	protected function getResponse($fp, $client_ver)
+	{
+		$response = '';
+		$len = 0;
+
+		$header = fread($fp, 8);
+		if (strlen($header) == 8) {
+			list($status, $ver, $len) = array_values(unpack('n2a/Nb', $header));
+			$left = $len;
+			while ($left > 0 && !feof($fp)) {
+				$chunk = fread($fp, min(8192, $left));
+				if ($chunk) {
+					$response .= $chunk;
+					$left -= strlen($chunk);
+				}
+			}
+		}
+		if ($this->socket === false) {
+			fclose($fp);
+		}
+
+		// check response
+		$read = strlen($response);
+		if (!$response || $read != $len) {
+			$this->error = $len
+				? "failed to read searchd response (status=$status, ver=$ver, len=$len, read=$read)"
+				: 'received zero-sized searchd response';
+			return false;
+		}
+
+		// check status
+		if ($status == SEARCHD_WARNING) {
+			list(, $wlen) = unpack('N*', substr($response, 0, 4));
+			$this->warning = substr($response, 4, $wlen);
+			return substr($response, 4 + $wlen);
+		}
+		if ($status == SEARCHD_ERROR) {
+			$this->error = 'searchd error: ' . substr($response, 4);
+			return false;
+		}
+		if ($status == SEARCHD_RETRY) {
+			$this->error = 'temporary searchd error: ' . substr($response, 4);
+			return false;
+		}
+		if ($status != SEARCHD_OK) {
+			$this->error = "unknown status code '$status'";
+			return false;
+		}
+
+		// check version
+		if ($ver < $client_ver) {
+			$this->warning = sprintf(
+				'searchd command v.%d.%d older than client\'s v.%d.%d, some options might not work',
+				$ver >> 8,
+				$ver & 0xff,
+				$client_ver >> 8,
+				$client_ver & 0xff
+			);
+		}
+
+		return $response;
+	}
+
+	/////////////////////////////////////////////////////////////////////////////
+	// searching
+	/////////////////////////////////////////////////////////////////////////////
+
+	/// set offset and count into result set,
+	/// and optionally set max-matches and cutoff limits
+	public function setLimits($offset, $limit, $max = 0, $cutoff = 0)
+	{
+		assert(is_int($offset));
+		assert(is_int($limit));
+		assert($offset >= 0);
+		assert($limit > 0);
+		assert($max >= 0);
+		$this->offset = $offset;
+		$this->limit = $limit;
+		if ($max > 0) {
+			$this->max_matches = $max;
+		}
+		if ($cutoff > 0) {
+			$this->cutoff = $cutoff;
+		}
+	}
+
+	/// set maximum query time, in milliseconds, per-index
+	/// integer, 0 means 'do not limit'
+	public function setMaxQueryTime($max)
+	{
+		assert(is_int($max));
+		assert($max >= 0);
+		$this->max_query_time = $max;
+	}
+
+	/// set matching mode
+	public function setMatchMode($mode)
+	{
+		trigger_error(
+			'DEPRECATED: Do not call this method or, even better, use SphinxQL instead of an API',
+			E_USER_DEPRECATED
+		);
+		assert(
+			$mode == SPH_MATCH_ALL ||
+			$mode == SPH_MATCH_ANY ||
+			$mode == SPH_MATCH_PHRASE ||
+			$mode == SPH_MATCH_BOOLEAN ||
+			$mode == SPH_MATCH_EXTENDED ||
+			$mode == SPH_MATCH_FULLSCAN ||
+			$mode == SPH_MATCH_EXTENDED2
+		);
+		$this->mode = $mode;
+	}
+
+	/// set ranking mode
+	public function setRankingMode($ranker, $rankexpr='')
+	{
+		assert($ranker === 0 || $ranker >= 1 && $ranker < SPH_RANK_TOTAL);
+		assert(is_string($rankexpr));
+		$this->ranker = $ranker;
+		$this->rank_expr = $rankexpr;
+	}
+
+	/// set matches sorting mode
+	public function setSortMode($mode, $sortby = '')
+	{
+		assert (
+			$mode == SPH_SORT_RELEVANCE ||
+			$mode == SPH_SORT_ATTR_DESC ||
+			$mode == SPH_SORT_ATTR_ASC ||
+			$mode == SPH_SORT_TIME_SEGMENTS ||
+			$mode == SPH_SORT_EXTENDED ||
+			$mode == SPH_SORT_EXPR
+		);
+		assert(is_string($sortby));
+		assert($mode == SPH_SORT_RELEVANCE || strlen($sortby) > 0);
+
+		$this->sort = $mode;
+		$this->sort_by = $sortby;
+	}
+
+	/**
+	 * Bind per-field weights by order
+	 *
+	 * @deprecated use setFieldWeights() instead
+	 */
+	public function setWeights()
+	{
+		throw new \RuntimeException('This method is now deprecated; please use setFieldWeights instead');
+	}
+
+	/// bind per-field weights by name
+	public function setFieldWeights($weights)
+	{
+		assert(is_array($weights));
+		foreach ($weights as $name => $weight) {
+			assert(is_string($name));
+			assert(is_int($weight));
+		}
+		$this->field_weights = $weights;
+	}
+
+	/// bind per-index weights by name
+	public function setIndexWeights($weights)
+	{
+		assert(is_array($weights));
+		foreach ($weights as $index => $weight) {
+			assert(is_string($index));
+			assert(is_int($weight));
+		}
+		$this->index_weights = $weights;
+	}
+
+	/// set IDs range to match
+	/// only match records if document ID is beetwen $min and $max (inclusive)
+	public function setIDRange($min, $max)
+	{
+		assert(is_numeric($min));
+		assert(is_numeric($max));
+		assert($min <= $max);
+		$this->min_id = $min;
+		$this->max_id = $max;
+	}
+
+	/// set values set filter
+	/// only match records where $attribute value is in given set
+	public function setFilter($attribute, $values, $exclude = false)
+	{
+		assert(is_string($attribute));
+		assert(is_array($values));
+		assert(count($values));
+
+		if (is_array($values) && count($values)) {
+			foreach ($values as $value) {
+				assert(is_numeric($value));
+			}
+
+			$this->filters[] = array(
+				'type' => SPH_FILTER_VALUES,
+				'attr' => $attribute,
+				'exclude' => $exclude,
+				'values' => $values
+			);
+		}
+	}
+
+	/// set string filter
+	/// only match records where $attribute value is equal
+	public function setFilterString($attribute, $value, $exclude = false)
+	{
+		assert(is_string($attribute));
+		assert(is_string($value));
+		$this->filters[] = array(
+			'type' => SPH_FILTER_STRING,
+			'attr' => $attribute,
+			'exclude' => $exclude,
+			'value' => $value
+		);
+	}    
+
+	/// set range filter
+	/// only match records if $attribute value is beetwen $min and $max (inclusive)
+	public function setFilterRange($attribute, $min, $max, $exclude = false)
+	{
+		assert(is_string($attribute));
+		assert(is_numeric($min));
+		assert(is_numeric($max));
+		assert($min <= $max);
+
+		$this->filters[] = array(
+			'type' => SPH_FILTER_RANGE,
+			'attr' => $attribute,
+			'exclude' => $exclude,
+			'min' => $min,
+			'max' => $max
+		);
+	}
+
+	/// set float range filter
+	/// only match records if $attribute value is beetwen $min and $max (inclusive)
+	public function setFilterFloatRange($attribute, $min, $max, $exclude = false)
+	{
+		assert(is_string($attribute));
+		assert(is_float($min));
+		assert(is_float($max));
+		assert($min <= $max);
+
+		$this->filters[] = array(
+			'type' => SPH_FILTER_FLOATRANGE,
+			'attr' => $attribute,
+			'exclude' => $exclude,
+			'min' => $min,
+			'max' => $max
+		);
+	}
+
+	/// setup anchor point for geosphere distance calculations
+	/// required to use @geodist in filters and sorting
+	/// latitude and longitude must be in radians
+	public function setGeoAnchor($attrlat, $attrlong, $lat, $long)
+	{
+		assert(is_string($attrlat));
+		assert(is_string($attrlong));
+		assert(is_float($lat));
+		assert(is_float($long));
+
+		$this->anchor = array(
+			'attrlat' => $attrlat,
+			'attrlong' => $attrlong,
+			'lat' => $lat,
+			'long' => $long
+		);
+	}
+
+	/// set grouping attribute and function
+	public function setGroupBy($attribute, $func, $groupsort = '@group desc')
+	{
+		assert(is_string($attribute));
+		assert(is_string($groupsort));
+		assert(
+			$func == SPH_GROUPBY_DAY ||
+			$func == SPH_GROUPBY_WEEK ||
+			$func == SPH_GROUPBY_MONTH ||
+			$func == SPH_GROUPBY_YEAR ||
+			$func == SPH_GROUPBY_ATTR ||
+			$func == SPH_GROUPBY_ATTRPAIR
+		);
+
+		$this->group_by = $attribute;
+		$this->group_func = $func;
+		$this->group_sort = $groupsort;
+	}
+
+	/// set count-distinct attribute for group-by queries
+	public function setGroupDistinct($attribute)
+	{
+		assert(is_string($attribute));
+		$this->group_distinct = $attribute;
+	}
+
+	/// set distributed retries count and delay
+	public function setRetries($count, $delay = 0)
+	{
+		assert(is_int($count) && $count >= 0);
+		assert(is_int($delay) && $delay >= 0);
+		$this->retry_count = $count;
+		$this->retry_delay = $delay;
+	}
+
+	/// set result set format (hash or array; hash by default)
+	/// PHP specific; needed for group-by-MVA result sets that may contain duplicate IDs
+	public function setArrayResult($arrayresult)
+	{
+		assert(is_bool($arrayresult));
+		$this->array_result = $arrayresult;
+	}
+
+	/// set attribute values override
+	/// there can be only one override per attribute
+	/// $values must be a hash that maps document IDs to attribute values
+	public function setOverride($attrname, $attrtype, $values)
+	{
+		trigger_error(
+			'DEPRECATED: Do not call this method. Use SphinxQL REMAP() function instead.',
+			E_USER_DEPRECATED
+		);
+		assert(is_string($attrname));
+		assert(in_array($attrtype, array(
+			SPH_ATTR_INTEGER,
+			SPH_ATTR_TIMESTAMP,
+			SPH_ATTR_BOOL,
+			SPH_ATTR_FLOAT,
+			SPH_ATTR_BIGINT
+		)));
+		assert(is_array($values));
+
+		$this->overrides[$attrname] = array(
+			'attr' => $attrname,
+			'type' => $attrtype,
+			'values' => $values
+		);
+	}
+
+	/// set select-list (attributes or expressions), SQL-like syntax
+	public function setSelect($select)
+	{
+		assert(is_string($select));
+		$this->select = $select;
+	}
+
+	public function setQueryFlag($flag_name, $flag_value)
+	{
+		$known_names = array(
+			'reverse_scan',
+			'sort_method',
+			'max_predicted_time',
+			'boolean_simplify',
+			'idf',
+			'global_idf',
+			'low_priority'
+		);
+		$flags = array (
+			'reverse_scan' => array(0, 1),
+			'sort_method' => array('pq', 'kbuffer'),
+			'max_predicted_time' => array(0),
+			'boolean_simplify' => array(true, false),
+			'idf' => array ('normalized', 'plain', 'tfidf_normalized', 'tfidf_unnormalized'),
+			'global_idf' => array(true, false),
+			'low_priority' => array(true, false)
+		);
+
+		assert(isset($flag_name, $known_names));
+		assert(
+			in_array($flag_value, $flags[$flag_name], true) ||
+			($flag_name == 'max_predicted_time' && is_int($flag_value) && $flag_value >= 0)
+		);
+
+		if ($flag_name == 'reverse_scan') {
+			$this->query_flags = sphSetBit($this->query_flags, 0, $flag_value == 1);
+		}
+		if ($flag_name == 'sort_method') {
+			$this->query_flags = sphSetBit($this->query_flags, 1, $flag_value == 'kbuffer');
+		}
+		if ($flag_name == 'max_predicted_time') {
+			$this->query_flags = sphSetBit($this->query_flags, 2, $flag_value > 0);
+			$this->predicted_time = (int)$flag_value;
+		}
+		if ($flag_name == 'boolean_simplify') {
+			$this->query_flags = sphSetBit($this->query_flags, 3, $flag_value);
+		}
+		if ($flag_name == 'idf' && ($flag_value == 'normalized' || $flag_value == 'plain')) {
+			$this->query_flags = sphSetBit($this->query_flags, 4, $flag_value == 'plain');
+		}
+		if ($flag_name == 'global_idf') {
+			$this->query_flags = sphSetBit($this->query_flags, 5, $flag_value);
+		}
+		if ($flag_name == 'idf' && ($flag_value == 'tfidf_normalized' || $flag_value == 'tfidf_unnormalized')) {
+			$this->query_flags = sphSetBit($this->query_flags, 6, $flag_value == 'tfidf_normalized');
+		}
+		if ($flag_name == 'low_priority') {
+			$this->query_flags = sphSetBit($this->query_flags, 8, $flag_value);
+		}
+	}
+
+	/// set outer order by parameters
+	public function setOuterSelect($orderby, $offset, $limit)
+	{
+		assert(is_string($orderby));
+		assert(is_int($offset));
+		assert(is_int($limit));
+		assert($offset >= 0);
+		assert($limit > 0);
+
+		$this->outer_order_by = $orderby;
+		$this->outer_offset = $offset;
+		$this->outer_limit = $limit;
+		$this->has_outer = true;
+	}
+
+
+	//////////////////////////////////////////////////////////////////////////////
+
+	/// clear all filters (for multi-queries)
+	public function resetFilters()
+	{
+		$this->filters = array();
+		$this->anchor = array();
+	}
+
+	/// clear groupby settings (for multi-queries)
+	public function resetGroupBy()
+	{
+		$this->group_by = '';
+		$this->group_func = SPH_GROUPBY_DAY;
+		$this->group_sort = '@group desc';
+		$this->group_distinct = '';
+	}
+
+	/// clear all attribute value overrides (for multi-queries)
+	public function resetOverrides()
+	{
+		$this->overrides = array();
+	}
+
+	public function resetQueryFlag()
+	{
+		$this->query_flags = sphSetBit(0, 6, true); // default idf=tfidf_normalized
+		$this->predicted_time = 0;
+	}
+
+	public function resetOuterSelect()
+	{
+		$this->outer_order_by = '';
+		$this->outer_offset = 0;
+		$this->outer_limit = 0;
+		$this->has_outer = false;
+	}
+
+	//////////////////////////////////////////////////////////////////////////////
+
+	/// connect to searchd server, run given search query through given indexes,
+	/// and return the search results
+	public function query($query, $index = '*', $comment = '')
+	{
+		assert(empty($this->reqs));
+
+		$this->addQuery($query, $index, $comment);
+		$results = $this->runQueries();
+		$this->reqs = array(); // just in case it failed too early
+
+		if (!is_array($results)) {
+			return false; // probably network error; error message should be already filled
+		}
+
+		$this->error = $results[0]['error'];
+		$this->warning = $results[0]['warning'];
+		if ($results[0]['status'] == SEARCHD_ERROR) {
+			return false;
+		} else {
+			return $results[0];
+		}
+	}
+
+	/// helper to pack floats in network byte order
+	protected function packFloat($f)
+	{
+		$t1 = pack('f', $f); // machine order
+		list(, $t2) = unpack('L*', $t1); // int in machine order
+		return pack('N', $t2);
+	}
+
+	/// add query to multi-query batch
+	/// returns index into results array from RunQueries() call
+	public function addQuery($query, $index = '*', $comment = '')
+	{
+		// mbstring workaround
+		$this->mbPush();
+
+		// build request
+		$req = pack('NNNNN', $this->query_flags, $this->offset, $this->limit, $this->mode, $this->ranker);
+		if ($this->ranker == SPH_RANK_EXPR) {
+			$req .= pack('N', strlen($this->rank_expr)) . $this->rank_expr;
+		}
+		$req .= pack('N', $this->sort); // (deprecated) sort mode
+		$req .= pack('N', strlen($this->sort_by)) . $this->sort_by;
+		$req .= pack('N', strlen($query)) . $query; // query itself
+		$req .= pack('N', count($this->weights)); // weights
+		foreach ($this->weights as $weight) {
+			$req .= pack('N', (int)$weight);
+		}
+		$req .= pack('N', strlen($index)) . $index; // indexes
+		$req .= pack('N', 1); // id64 range marker
+		$req .= sphPackU64($this->min_id) . sphPackU64($this->max_id); // id64 range
+
+		// filters
+		$req .= pack('N', count($this->filters));
+		foreach ($this->filters as $filter) {
+			$req .= pack('N', strlen($filter['attr'])) . $filter['attr'];
+			$req .= pack('N', $filter['type']);
+			switch ($filter['type']) {
+				case SPH_FILTER_VALUES:
+					$req .= pack('N', count($filter['values']));
+					foreach ($filter['values'] as $value) {
+						$req .= sphPackI64($value);
+					}
+					break;
+				case SPH_FILTER_RANGE:
+					$req .= sphPackI64($filter['min']) . sphPackI64($filter['max']);
+					break;
+				case SPH_FILTER_FLOATRANGE:
+					$req .= $this->packFloat($filter['min']) . $this->packFloat($filter['max']);
+					break;
+				case SPH_FILTER_STRING:
+					$req .= pack('N', strlen($filter['value'])) . $filter['value'];
+					break;
+				default:
+					assert(0 && 'internal error: unhandled filter type');
+			}
+			$req .= pack('N', $filter['exclude']);
+		}
+
+		// group-by clause, max-matches count, group-sort clause, cutoff count
+		$req .= pack('NN', $this->group_func, strlen($this->group_by)) . $this->group_by;
+		$req .= pack('N', $this->max_matches);
+		$req .= pack('N', strlen($this->group_sort)) . $this->group_sort;
+		$req .= pack('NNN', $this->cutoff, $this->retry_count, $this->retry_delay);
+		$req .= pack('N', strlen($this->group_distinct)) . $this->group_distinct;
+
+		// anchor point
+		if (empty($this->anchor)) {
+			$req .= pack('N', 0);
+		} else {
+			$a =& $this->anchor;
+			$req .= pack('N', 1);
+			$req .= pack('N', strlen($a['attrlat'])) . $a['attrlat'];
+			$req .= pack('N', strlen($a['attrlong'])) . $a['attrlong'];
+			$req .= $this->packFloat($a['lat']) . $this->packFloat($a['long']);
+		}
+
+		// per-index weights
+		$req .= pack('N', count($this->index_weights));
+		foreach ($this->index_weights as $idx => $weight) {
+			$req .= pack('N', strlen($idx)) . $idx . pack('N', $weight);
+		}
+
+		// max query time
+		$req .= pack('N', $this->max_query_time);
+
+		// per-field weights
+		$req .= pack('N', count($this->field_weights));
+		foreach ($this->field_weights as $field => $weight) {
+			$req .= pack('N', strlen($field)) . $field . pack('N', $weight);
+		}
+
+		// comment
+		$req .= pack('N', strlen($comment)) . $comment;
+
+		// attribute overrides
+		$req .= pack('N', count($this->overrides));
+		foreach ($this->overrides as $key => $entry) {
+			$req .= pack('N', strlen($entry['attr'])) . $entry['attr'];
+			$req .= pack('NN', $entry['type'], count($entry['values']));
+			foreach ($entry['values'] as $id => $val) {
+				assert(is_numeric($id));
+				assert(is_numeric($val));
+
+				$req .= sphPackU64($id);
+				switch ($entry['type']) {
+					case SPH_ATTR_FLOAT:
+						$req .= $this->packFloat($val);
+						break;
+					case SPH_ATTR_BIGINT:
+						$req .= sphPackI64($val);
+						break;
+					default:
+						$req .= pack('N', $val);
+						break;
+				}
+			}
+		}
+
+		// select-list
+		$req .= pack('N', strlen($this->select)) . $this->select;
+
+		// max_predicted_time
+		if ($this->predicted_time > 0) {
+			$req .= pack('N', (int)$this->predicted_time);
+		}
+
+		$req .= pack('N', strlen($this->outer_order_by)) . $this->outer_order_by;
+		$req .= pack('NN', $this->outer_offset, $this->outer_limit);
+		if ($this->has_outer) {
+			$req .= pack('N', 1);
+		} else {
+			$req .= pack('N', 0);
+		}
+
+		// mbstring workaround
+		$this->mbPop();
+
+		// store request to requests array
+		$this->reqs[] = $req;
+		return count($this->reqs) - 1;
+	}
+
+	/// connect to searchd, run queries batch, and return an array of result sets
+	public function runQueries()
+	{
+		if (empty($this->reqs)) {
+			$this->error = 'no queries defined, issue AddQuery() first';
+			return false;
+		}
+
+		// mbstring workaround
+		$this->mbPush();
+
+		if (!($fp = $this->connect())) {
+			$this->mbPop();
+			return false;
+		}
+
+		// send query, get response
+		$nreqs = count($this->reqs);
+		$req = join('', $this->reqs);
+		$len = 8 + strlen($req);
+		$req = pack('nnNNN', SEARCHD_COMMAND_SEARCH, VER_COMMAND_SEARCH, $len, 0, $nreqs) . $req; // add header
+
+		if (!$this->send($fp, $req, $len + 8) || !($response = $this->getResponse($fp, VER_COMMAND_SEARCH))) {
+			$this->mbPop();
+			return false;
+		}
+
+		// query sent ok; we can reset reqs now
+		$this->reqs = array();
+
+		// parse and return response
+		return $this->parseSearchResponse($response, $nreqs);
+	}
+
+	/// parse and return search query (or queries) response
+	protected function parseSearchResponse($response, $nreqs)
+	{
+		$p = 0; // current position
+		$max = strlen($response); // max position for checks, to protect against broken responses
+
+		$results = array();
+		for ($ires = 0; $ires < $nreqs && $p < $max; $ires++) {
+			$results[] = array();
+			$result =& $results[$ires];
+
+			$result['error'] = '';
+			$result['warning'] = '';
+
+			// extract status
+			list(, $status) = unpack('N*', substr($response, $p, 4));
+			$p += 4;
+			$result['status'] = $status;
+			if ($status != SEARCHD_OK) {
+				list(, $len) = unpack('N*', substr($response, $p, 4));
+				$p += 4;
+				$message = substr($response, $p, $len);
+				$p += $len;
+
+				if ($status == SEARCHD_WARNING) {
+					$result['warning'] = $message;
+				} else {
+					$result['error'] = $message;
+					continue;
+				}
+			}
+
+			// read schema
+			$fields = array();
+			$attrs = array();
+
+			list(, $nfields) = unpack('N*', substr($response, $p, 4));
+			$p += 4;
+			while ($nfields --> 0 && $p < $max) {
+				list(, $len) = unpack('N*', substr($response, $p, 4));
+				$p += 4;
+				$fields[] = substr($response, $p, $len);
+				$p += $len;
+			}
+			$result['fields'] = $fields;
+
+			list(, $nattrs) = unpack('N*', substr($response, $p, 4));
+			$p += 4;
+			while ($nattrs --> 0 && $p < $max) {
+				list(, $len) = unpack('N*', substr($response, $p, 4));
+				$p += 4;
+				$attr = substr($response, $p, $len);
+				$p += $len;
+				list(, $type) = unpack('N*', substr($response, $p, 4));
+				$p += 4;
+				$attrs[$attr] = $type;
+			}
+			$result['attrs'] = $attrs;
+
+			// read match count
+			list(, $count) = unpack('N*', substr($response, $p, 4));
+			$p += 4;
+			list(, $id64) = unpack('N*', substr($response, $p, 4));
+			$p += 4;
+
+			// read matches
+			$idx = -1;
+			while ($count --> 0 && $p < $max) {
+				// index into result array
+				$idx++;
+
+				// parse document id and weight
+				if ($id64) {
+					$doc = sphUnpackU64(substr($response, $p, 8));
+					$p += 8;
+					list(,$weight) = unpack('N*', substr($response, $p, 4));
+					$p += 4;
+				} else {
+					list($doc, $weight) = array_values(unpack('N*N*', substr($response, $p, 8)));
+					$p += 8;
+					$doc = sphFixUint($doc);
+				}
+				$weight = sprintf('%u', $weight);
+
+				// create match entry
+				if ($this->array_result) {
+					$result['matches'][$idx] = array('id' => $doc, 'weight' => $weight);
+				} else {
+					$result['matches'][$doc]['weight'] = $weight;
+				}
+
+				// parse and create attributes
+				$attrvals = array();
+				foreach ($attrs as $attr => $type) {
+					// handle 64bit ints
+					if ($type == SPH_ATTR_BIGINT) {
+						$attrvals[$attr] = sphUnpackI64(substr($response, $p, 8));
+						$p += 8;
+						continue;
+					}
+
+					// handle floats
+					if ($type == SPH_ATTR_FLOAT) {
+						list(, $uval) = unpack('N*', substr($response, $p, 4));
+						$p += 4;
+						list(, $fval) = unpack('f*', pack('L', $uval));
+						$attrvals[$attr] = $fval;
+						continue;
+					}
+
+					// handle everything else as unsigned ints
+					list(, $val) = unpack('N*', substr($response, $p, 4));
+					$p += 4;
+					if ($type == SPH_ATTR_MULTI) {
+						$attrvals[$attr] = array();
+						$nvalues = $val;
+						while ($nvalues --> 0 && $p < $max) {
+							list(, $val) = unpack('N*', substr($response, $p, 4));
+							$p += 4;
+							$attrvals[$attr][] = sphFixUint($val);
+						}
+					} elseif ($type == SPH_ATTR_MULTI64) {
+						$attrvals[$attr] = array();
+						$nvalues = $val;
+						while ($nvalues > 0 && $p < $max) {
+							$attrvals[$attr][] = sphUnpackI64(substr($response, $p, 8));
+							$p += 8;
+							$nvalues -= 2;
+						}
+					} elseif ($type == SPH_ATTR_STRING) {
+						$attrvals[$attr] = substr($response, $p, $val);
+						$p += $val;
+					} elseif ($type == SPH_ATTR_FACTORS) {
+						$attrvals[$attr] = substr($response, $p, $val - 4);
+						$p += $val-4;
+					} else {
+						$attrvals[$attr] = sphFixUint($val);
+					}
+				}
+
+				if ($this->array_result) {
+					$result['matches'][$idx]['attrs'] = $attrvals;
+				} else {
+					$result['matches'][$doc]['attrs'] = $attrvals;
+				}
+			}
+
+			list($total, $total_found, $msecs, $words) = array_values(unpack('N*N*N*N*', substr($response, $p, 16)));
+			$result['total'] = sprintf('%u', $total);
+			$result['total_found'] = sprintf('%u', $total_found);
+			$result['time'] = sprintf('%.3f', $msecs / 1000);
+			$p += 16;
+
+			while ($words --> 0 && $p < $max) {
+				list(, $len) = unpack('N*', substr($response, $p, 4));
+				$p += 4;
+				$word = substr($response, $p, $len);
+				$p += $len;
+				list($docs, $hits) = array_values(unpack('N*N*', substr($response, $p, 8)));
+				$p += 8;
+				$result['words'][$word] = array (
+					'docs' => sprintf('%u', $docs),
+					'hits' => sprintf('%u', $hits)
+				);
+			}
+		}
+
+		$this->mbPop();
+		return $results;
+	}
+
+	/////////////////////////////////////////////////////////////////////////////
+	// excerpts generation
+	/////////////////////////////////////////////////////////////////////////////
+
+	/// connect to searchd server, and generate exceprts (snippets)
+	/// of given documents for given query. returns false on failure,
+	/// an array of snippets on success
+	public function buildExcerpts($docs, $index, $words, $opts = array())
+	{
+		assert(is_array($docs));
+		assert(is_string($index));
+		assert(is_string($words));
+		assert(is_array($opts));
+
+		$this->mbPush();
+
+		if (!($fp = $this->connect())) {
+			$this->mbPop();
+			return false;
+		}
+
+		/////////////////
+		// fixup options
+		/////////////////
+
+		if (!isset($opts['before_match'])) {
+			$opts['before_match'] = '<b>';
+		}
+		if (!isset($opts['after_match'])) {
+			$opts['after_match'] = '</b>';
+		}
+		if (!isset($opts['chunk_separator'])) {
+			$opts['chunk_separator'] = ' ... ';
+		}
+		if (!isset($opts['limit'])) {
+			$opts['limit'] = 256;
+		}
+		if (!isset($opts['limit_passages'])) {
+			$opts['limit_passages'] = 0;
+		}
+		if (!isset($opts['limit_words'])) {
+			$opts['limit_words'] = 0;
+		}
+		if (!isset($opts['around'])) {
+			$opts['around'] = 5;
+		}
+		if (!isset($opts['exact_phrase'])) {
+			$opts['exact_phrase'] = false;
+		}
+		if (!isset($opts['single_passage'])) {
+			$opts['single_passage'] = false;
+		}
+		if (!isset($opts['use_boundaries'])) {
+			$opts['use_boundaries'] = false;
+		}
+		if (!isset($opts['weight_order'])) {
+			$opts['weight_order'] = false;
+		}
+		if (!isset($opts['query_mode'])) {
+			$opts['query_mode'] = false;
+		}
+		if (!isset($opts['force_all_words'])) {
+			$opts['force_all_words'] = false;
+		}
+		if (!isset($opts['start_passage_id'])) {
+			$opts['start_passage_id'] = 1;
+		}
+		if (!isset($opts['load_files'])) {
+			$opts['load_files'] = false;
+		}
+		if (!isset($opts['html_strip_mode'])) {
+			$opts['html_strip_mode'] = 'index';
+		}
+		if (!isset($opts['allow_empty'])) {
+			$opts['allow_empty'] = false;
+		}
+		if (!isset($opts['passage_boundary'])) {
+			$opts['passage_boundary'] = 'none';
+		}
+		if (!isset($opts['emit_zones'])) {
+			$opts['emit_zones'] = false;
+		}
+		if (!isset($opts['load_files_scattered'])) {
+			$opts['load_files_scattered'] = false;
+		}
+
+
+		/////////////////
+		// build request
+		/////////////////
+
+		// v.1.2 req
+		$flags = 1; // remove spaces
+		if ($opts['exact_phrase']) {
+			$flags |= 2;
+		}
+		if ($opts['single_passage']) {
+			$flags |= 4;
+		}
+		if ($opts['use_boundaries']) {
+			$flags |= 8;
+		}
+		if ($opts['weight_order']) {
+			$flags |= 16;
+		}
+		if ($opts['query_mode']) {
+			$flags |= 32;
+		}
+		if ($opts['force_all_words']) {
+			$flags |= 64;
+		}
+		if ($opts['load_files']) {
+			$flags |= 128;
+		}
+		if ($opts['allow_empty']) {
+			$flags |= 256;
+		}
+		if ($opts['emit_zones']) {
+			$flags |= 512;
+		}
+		if ($opts['load_files_scattered']) {
+			$flags |= 1024;
+		}
+		$req = pack('NN', 0, $flags); // mode=0, flags=$flags
+		$req .= pack('N', strlen($index)) . $index; // req index
+		$req .= pack('N', strlen($words)) . $words; // req words
+
+		// options
+		$req .= pack('N', strlen($opts['before_match'])) . $opts['before_match'];
+		$req .= pack('N', strlen($opts['after_match'])) . $opts['after_match'];
+		$req .= pack('N', strlen($opts['chunk_separator'])) . $opts['chunk_separator'];
+		$req .= pack('NN', (int)$opts['limit'], (int)$opts['around']);
+		$req .= pack('NNN', (int)$opts['limit_passages'], (int)$opts['limit_words'], (int)$opts['start_passage_id']); // v.1.2
+		$req .= pack('N', strlen($opts['html_strip_mode'])) . $opts['html_strip_mode'];
+		$req .= pack('N', strlen($opts['passage_boundary'])) . $opts['passage_boundary'];
+
+		// documents
+		$req .= pack('N', count($docs));
+		foreach ($docs as $doc) {
+			assert(is_string($doc));
+			$req .= pack('N', strlen($doc)) . $doc;
+		}
+
+		////////////////////////////
+		// send query, get response
+		////////////////////////////
+
+		$len = strlen($req);
+		$req = pack('nnN', SEARCHD_COMMAND_EXCERPT, VER_COMMAND_EXCERPT, $len) . $req; // add header
+		if (!$this->send($fp, $req, $len + 8) || !($response = $this->getResponse($fp, VER_COMMAND_EXCERPT))) {
+			$this->mbPop();
+			return false;
+		}
+
+		//////////////////
+		// parse response
+		//////////////////
+
+		$pos = 0;
+		$res = array();
+		$rlen = strlen($response);
+		$count = count($docs);
+		while ($count--) {
+			list(, $len) = unpack('N*', substr($response, $pos, 4));
+			$pos += 4;
+
+			if ($pos + $len > $rlen) {
+				$this->error = 'incomplete reply';
+				$this->mbPop();
+				return false;
+			}
+			$res[] = $len ? substr($response, $pos, $len) : '';
+			$pos += $len;
+		}
+
+		$this->mbPop();
+		return $res;
+	}
+
+
+	/////////////////////////////////////////////////////////////////////////////
+	// keyword generation
+	/////////////////////////////////////////////////////////////////////////////
+
+	/// connect to searchd server, and generate keyword list for a given query
+	/// returns false on failure,
+	/// an array of words on success
+	public function buildKeywords($query, $index, $hits)
+	{
+		assert(is_string($query));
+		assert(is_string($index));
+		assert(is_bool($hits));
+
+		$this->mbPush();
+
+		if (!($fp = $this->connect())) {
+			$this->mbPop();
+			return false;
+		}
+
+		/////////////////
+		// build request
+		/////////////////
+
+		// v.1.0 req
+		$req  = pack('N', strlen($query)) . $query; // req query
+		$req .= pack('N', strlen($index)) . $index; // req index
+		$req .= pack('N', (int)$hits);
+
+		////////////////////////////
+		// send query, get response
+		////////////////////////////
+
+		$len = strlen($req);
+		$req = pack('nnN', SEARCHD_COMMAND_KEYWORDS, VER_COMMAND_KEYWORDS, $len) . $req; // add header
+		if (!$this->send($fp, $req, $len + 8) || !($response = $this->getResponse($fp, VER_COMMAND_KEYWORDS))) {
+			$this->mbPop();
+			return false;
+		}
+
+		//////////////////
+		// parse response
+		//////////////////
+
+		$pos = 0;
+		$res = array();
+		$rlen = strlen($response);
+		list(, $nwords) = unpack('N*', substr($response, $pos, 4));
+		$pos += 4;
+		for ($i = 0; $i < $nwords; $i++) {
+			list(, $len) = unpack('N*', substr($response, $pos, 4));
+			$pos += 4;
+			$tokenized = $len ? substr($response, $pos, $len) : '';
+			$pos += $len;
+
+			list(, $len) = unpack('N*', substr($response, $pos, 4));
+			$pos += 4;
+			$normalized = $len ? substr($response, $pos, $len) : '';
+			$pos += $len;
+
+			$res[] = array(
+				'tokenized' => $tokenized,
+				'normalized' => $normalized
+			);
+
+			if ($hits) {
+				list($ndocs, $nhits) = array_values(unpack('N*N*', substr($response, $pos, 8)));
+				$pos += 8;
+				$res[$i]['docs'] = $ndocs;
+				$res[$i]['hits'] = $nhits;
+			}
+
+			if ($pos > $rlen) {
+				$this->error = 'incomplete reply';
+				$this->mbPop();
+				return false;
+			}
+		}
+
+		$this->mbPop();
+		return $res;
+	}
+
+	public function escapeString($string)
+	{
+		$from = array('\\', '(',')','|','-','!','@','~','"','&', '/', '^', '$', '=', '<');
+		$to   = array('\\\\', '\(','\)','\|','\-','\!','\@','\~','\"', '\&', '\/', '\^', '\$', '\=', '\<');
+
+		return str_replace($from, $to, $string);
+	}
+
+	/////////////////////////////////////////////////////////////////////////////
+	// attribute updates
+	/////////////////////////////////////////////////////////////////////////////
+
+	/// batch update given attributes in given rows in given indexes
+	/// returns amount of updated documents (0 or more) on success, or -1 on failure
+	public function updateAttributes($index, $attrs, $values, $mva = false, $ignorenonexistent = false)
+	{
+		// verify everything
+		assert(is_string($index));
+		assert(is_bool($mva));
+		assert(is_bool($ignorenonexistent));
+
+		assert(is_array($attrs));
+		foreach ($attrs as $attr) {
+			assert(is_string($attr));
+		}
+
+		assert(is_array($values));
+		foreach ($values as $id => $entry) {
+			assert(is_numeric($id));
+			assert(is_array($entry));
+			assert(count($entry) == count($attrs));
+			foreach ($entry as $v) {
+				if ($mva) {
+					assert(is_array($v));
+					foreach ($v as $vv) {
+						assert(is_int($vv));
+					}
+				} else {
+					assert(is_int($v));
+				}
+			}
+		}
+
+		// build request
+		$this->mbPush();
+		$req = pack('N', strlen($index)) . $index;
+
+		$req .= pack('N', count($attrs));
+		$req .= pack('N', $ignorenonexistent ? 1 : 0);
+		foreach ($attrs as $attr) {
+			$req .= pack('N', strlen($attr)) . $attr;
+			$req .= pack('N', $mva ? 1 : 0);
+		}
+
+		$req .= pack('N', count($values));
+		foreach ($values as $id => $entry) {
+			$req .= sphPackU64($id);
+			foreach ($entry as $v) {
+				$req .= pack('N', $mva ? count($v) : $v);
+				if ($mva) {
+					foreach ($v as $vv) {
+						$req .= pack('N', $vv);
+					}
+				}
+			}
+		}
+
+		// connect, send query, get response
+		if (!($fp = $this->connect())) {
+			$this->mbPop();
+			return -1;
+		}
+
+		$len = strlen($req);
+		$req = pack('nnN', SEARCHD_COMMAND_UPDATE, VER_COMMAND_UPDATE, $len) . $req; // add header
+		if (!$this->send($fp, $req, $len + 8)) {
+			$this->mbPop();
+			return -1;
+		}
+
+		if (!($response = $this->getResponse($fp, VER_COMMAND_UPDATE))) {
+			$this->mbPop();
+			return -1;
+		}
+
+		// parse response
+		list(, $updated) = unpack('N*', substr($response, 0, 4));
+		$this->mbPop();
+		return $updated;
+	}
+
+	/////////////////////////////////////////////////////////////////////////////
+	// persistent connections
+	/////////////////////////////////////////////////////////////////////////////
+
+	public function open()
+	{
+		if ($this->socket !== false) {
+			$this->error = 'already connected';
+			return false;
+		}
+		if (!($fp = $this->connect()))
+			return false;
+
+		// command, command version = 0, body length = 4, body = 1
+		$req = pack('nnNN', SEARCHD_COMMAND_PERSIST, 0, 4, 1);
+		if (!$this->send($fp, $req, 12)) {
+			return false;
+		}
+
+		$this->socket = $fp;
+		return true;
+	}
+
+	public function close()
+	{
+		if ($this->socket === false) {
+			$this->error = 'not connected';
+			return false;
+		}
+
+		fclose($this->socket);
+		$this->socket = false;
+
+		return true;
+	}
+
+	//////////////////////////////////////////////////////////////////////////
+	// status
+	//////////////////////////////////////////////////////////////////////////
+
+	public function status($session = false)
+	{
+		assert(is_bool($session));
+
+		$this->mbPush();
+		if (!($fp = $this->connect())) {
+			$this->mbPop();
+			return false;
+		}
+
+		$req = pack('nnNN', SEARCHD_COMMAND_STATUS, VER_COMMAND_STATUS, 4, $session ? 0 : 1); // len=4, body=1
+		if (!$this->send($fp, $req, 12) || !($response = $this->getResponse($fp, VER_COMMAND_STATUS))) {
+			$this->mbPop();
+			return false;
+		}
+
+		$res = substr($response, 4); // just ignore length, error handling, etc
+		$p = 0;
+		list($rows, $cols) = array_values(unpack('N*N*', substr($response, $p, 8)));
+		$p += 8;
+
+		$res = array();
+		for ($i = 0; $i < $rows; $i++) {
+			for ($j = 0; $j < $cols; $j++) {
+				list(, $len) = unpack('N*', substr($response, $p, 4));
+				$p += 4;
+				$res[$i][] = substr($response, $p, $len);
+				$p += $len;
+			}
+		}
+
+		$this->mbPop();
+		return $res;
+	}
+
+	//////////////////////////////////////////////////////////////////////////
+	// flush
+	//////////////////////////////////////////////////////////////////////////
+
+	public function flushAttributes()
+	{
+		$this->mbPush();
+		if (!($fp = $this->connect())) {
+			$this->mbPop();
+			return -1;
+		}
+
+		$req = pack('nnN', SEARCHD_COMMAND_FLUSHATTRS, VER_COMMAND_FLUSHATTRS, 0); // len=0
+		if (!$this->send($fp, $req, 8) || !($response = $this->getResponse($fp, VER_COMMAND_FLUSHATTRS))) {
+			$this->mbPop();
+			return -1;
+		}
+
+		$tag = -1;
+		if (strlen($response) == 4) {
+			list(, $tag) = unpack('N*', $response);
+		} else {
+			$this->error = 'unexpected response length';
+		}
+
+		$this->mbPop();
+		return $tag;
+	}
 }

Spacing +227 added lines, -227 removed lines

@@ -33,82 +33,82 @@ 
 /////////////////////////////////////////////////////////////////////////////
 
 /// known searchd commands
-define('SEARCHD_COMMAND_SEARCH',     0);
-define('SEARCHD_COMMAND_EXCERPT',    1);
-define('SEARCHD_COMMAND_UPDATE',     2);
-define('SEARCHD_COMMAND_KEYWORDS',   3);
-define('SEARCHD_COMMAND_PERSIST',    4);
-define('SEARCHD_COMMAND_STATUS',     5);
+define('SEARCHD_COMMAND_SEARCH', 0);
+define('SEARCHD_COMMAND_EXCERPT', 1);
+define('SEARCHD_COMMAND_UPDATE', 2);
+define('SEARCHD_COMMAND_KEYWORDS', 3);
+define('SEARCHD_COMMAND_PERSIST', 4);
+define('SEARCHD_COMMAND_STATUS', 5);
 define('SEARCHD_COMMAND_FLUSHATTRS', 7);
 
 /// current client-side command implementation versions
-define('VER_COMMAND_SEARCH',     0x11E);
-define('VER_COMMAND_EXCERPT',    0x104);
-define('VER_COMMAND_UPDATE',     0x103);
-define('VER_COMMAND_KEYWORDS',   0x100);
-define('VER_COMMAND_STATUS',     0x101);
-define('VER_COMMAND_QUERY',      0x100);
+define('VER_COMMAND_SEARCH', 0x11E);
+define('VER_COMMAND_EXCERPT', 0x104);
+define('VER_COMMAND_UPDATE', 0x103);
+define('VER_COMMAND_KEYWORDS', 0x100);
+define('VER_COMMAND_STATUS', 0x101);
+define('VER_COMMAND_QUERY', 0x100);
 define('VER_COMMAND_FLUSHATTRS', 0x100);
 
 /// known searchd status codes
-define('SEARCHD_OK',      0);
-define('SEARCHD_ERROR',   1);
-define('SEARCHD_RETRY',   2);
+define('SEARCHD_OK', 0);
+define('SEARCHD_ERROR', 1);
+define('SEARCHD_RETRY', 2);
 define('SEARCHD_WARNING', 3);
 
 /// known match modes
-define('SPH_MATCH_ALL',       0);
-define('SPH_MATCH_ANY',       1);
-define('SPH_MATCH_PHRASE',    2);
-define('SPH_MATCH_BOOLEAN',   3);
-define('SPH_MATCH_EXTENDED',  4);
-define('SPH_MATCH_FULLSCAN',  5);
+define('SPH_MATCH_ALL', 0);
+define('SPH_MATCH_ANY', 1);
+define('SPH_MATCH_PHRASE', 2);
+define('SPH_MATCH_BOOLEAN', 3);
+define('SPH_MATCH_EXTENDED', 4);
+define('SPH_MATCH_FULLSCAN', 5);
 define('SPH_MATCH_EXTENDED2', 6); // extended engine V2 (TEMPORARY, WILL BE REMOVED)
 
 /// known ranking modes (ext2 only)
 define('SPH_RANK_PROXIMITY_BM25', 0); ///< default mode, phrase proximity major factor and BM25 minor one
-define('SPH_RANK_BM25',           1); ///< statistical mode, BM25 ranking only (faster but worse quality)
-define('SPH_RANK_NONE',           2); ///< no ranking, all matches get a weight of 1
-define('SPH_RANK_WORDCOUNT',      3); ///< simple word-count weighting, rank is a weighted sum of per-field keyword occurence counts
-define('SPH_RANK_PROXIMITY',      4);
-define('SPH_RANK_MATCHANY',       5);
-define('SPH_RANK_FIELDMASK',      6);
-define('SPH_RANK_SPH04',          7);
-define('SPH_RANK_EXPR',           8);
-define('SPH_RANK_TOTAL',          9);
+define('SPH_RANK_BM25', 1); ///< statistical mode, BM25 ranking only (faster but worse quality)
+define('SPH_RANK_NONE', 2); ///< no ranking, all matches get a weight of 1
+define('SPH_RANK_WORDCOUNT', 3); ///< simple word-count weighting, rank is a weighted sum of per-field keyword occurence counts
+define('SPH_RANK_PROXIMITY', 4);
+define('SPH_RANK_MATCHANY', 5);
+define('SPH_RANK_FIELDMASK', 6);
+define('SPH_RANK_SPH04', 7);
+define('SPH_RANK_EXPR', 8);
+define('SPH_RANK_TOTAL', 9);
 
 /// known sort modes
-define('SPH_SORT_RELEVANCE',     0);
-define('SPH_SORT_ATTR_DESC',     1);
-define('SPH_SORT_ATTR_ASC',      2);
+define('SPH_SORT_RELEVANCE', 0);
+define('SPH_SORT_ATTR_DESC', 1);
+define('SPH_SORT_ATTR_ASC', 2);
 define('SPH_SORT_TIME_SEGMENTS', 3);
-define('SPH_SORT_EXTENDED',      4);
-define('SPH_SORT_EXPR',          5);
+define('SPH_SORT_EXTENDED', 4);
+define('SPH_SORT_EXPR', 5);
 
 /// known filter types
-define('SPH_FILTER_VALUES',     0);
-define('SPH_FILTER_RANGE',      1);
+define('SPH_FILTER_VALUES', 0);
+define('SPH_FILTER_RANGE', 1);
 define('SPH_FILTER_FLOATRANGE', 2);
-define('SPH_FILTER_STRING',     3);
+define('SPH_FILTER_STRING', 3);
 
 /// known attribute types
-define('SPH_ATTR_INTEGER',   1);
+define('SPH_ATTR_INTEGER', 1);
 define('SPH_ATTR_TIMESTAMP', 2);
-define('SPH_ATTR_ORDINAL',   3);
-define('SPH_ATTR_BOOL',      4);
-define('SPH_ATTR_FLOAT',     5);
-define('SPH_ATTR_BIGINT',    6);
-define('SPH_ATTR_STRING',    7);
-define('SPH_ATTR_FACTORS',   1001);
-define('SPH_ATTR_MULTI',     0x40000001);
-define('SPH_ATTR_MULTI64',   0x40000002);
+define('SPH_ATTR_ORDINAL', 3);
+define('SPH_ATTR_BOOL', 4);
+define('SPH_ATTR_FLOAT', 5);
+define('SPH_ATTR_BIGINT', 6);
+define('SPH_ATTR_STRING', 7);
+define('SPH_ATTR_FACTORS', 1001);
+define('SPH_ATTR_MULTI', 0x40000001);
+define('SPH_ATTR_MULTI64', 0x40000002);
 
 /// known grouping functions
-define('SPH_GROUPBY_DAY',      0);
-define('SPH_GROUPBY_WEEK',     1);
-define('SPH_GROUPBY_MONTH',    2);
-define('SPH_GROUPBY_YEAR',     3);
-define('SPH_GROUPBY_ATTR',     4);
+define('SPH_GROUPBY_DAY', 0);
+define('SPH_GROUPBY_WEEK', 1);
+define('SPH_GROUPBY_MONTH', 2);
+define('SPH_GROUPBY_YEAR', 3);
+define('SPH_GROUPBY_ATTR', 4);
 define('SPH_GROUPBY_ATTRPAIR', 5);
 
 // important properties of PHP's integers:
@@ -143,19 +143,19 @@ 
     assert(is_numeric($v));
 
     // x64
-    if (PHP_INT_SIZE >= 8) {
+    if (PHP_INT_SIZE>=8) {
         $v = (int)$v;
         return pack('NN', $v >> 32, $v & 0xFFFFFFFF);
     }
 
     // x32, int
     if (is_int($v)) {
-        return pack('NN', $v < 0 ? -1 : 0, $v);
+        return pack('NN', $v<0 ? -1 : 0, $v);
     }
 
     // x32, bcmath
     if (function_exists('bcmul')) {
-        if (bccomp($v, 0) == -1) {
+        if (bccomp($v, 0)==-1) {
             $v = bcadd('18446744073709551616', $v);
         }
         $h = bcdiv($v, '4294967296', 0);
@@ -173,8 +173,8 @@ 
     $l = $m - ($q * 4294967296.0);
     $h = $hi * 2328.0 + $q; // (10 ^ 13) / (1 << 32) = 2328
 
-    if ($v < 0) {
-        if ($l == 0) {
+    if ($v<0) {
+        if ($l==0) {
             $h = 4294967296.0 - $h;
         } else {
             $h = 4294967295.0 - $h;
@@ -190,8 +190,8 @@ 
     assert(is_numeric($v));
 
     // x64
-    if (PHP_INT_SIZE >= 8) {
-        assert($v >= 0);
+    if (PHP_INT_SIZE>=8) {
+        assert($v>=0);
 
         // x64, int
         if (is_int($v)) {
@@ -247,16 +247,16 @@ 
 {
     list($hi, $lo) = array_values(unpack('N*N*', $v));
 
-    if (PHP_INT_SIZE >= 8) {
-        if ($hi < 0) { // because php 5.2.2 to 5.2.5 is totally fucked up again
+    if (PHP_INT_SIZE>=8) {
+        if ($hi<0) { // because php 5.2.2 to 5.2.5 is totally fucked up again
             $hi += 1 << 32;
         }
-        if ($lo < 0) {
+        if ($lo<0) {
             $lo += 1 << 32;
         }
 
         // x64, int
-        if ($hi <= 2147483647) {
+        if ($hi<=2147483647) {
             return ($hi << 32) + $lo;
         }
 
@@ -269,20 +269,20 @@ 
         $C = 100000;
         $h = ((int)($hi / $C) << 32) + (int)($lo / $C);
         $l = (($hi % $C) << 32) + ($lo % $C);
-        if ($l > $C) {
+        if ($l>$C) {
             $h += (int)($l / $C);
             $l  = $l % $C;
         }
 
-        if ($h == 0) {
+        if ($h==0) {
             return $l;
         }
         return sprintf('%d%05d', $h, $l);
     }
 
     // x32, int
-    if ($hi == 0) {
-        if ($lo > 0) {
+    if ($hi==0) {
+        if ($lo>0) {
             return $lo;
         }
         return sprintf('%u', $lo);
@@ -309,10 +309,10 @@ 
 
     $h = sprintf('%.0f', $h);
     $l = sprintf('%07.0f', $l);
-    if ($h == '0') {
+    if ($h=='0') {
         return sprintf('%.0f', (float)$l);
     }
-    return $h . $l;
+    return $h.$l;
 }
 
 // unpack 64-bit signed
@@ -321,24 +321,24 @@ 
     list($hi, $lo) = array_values(unpack('N*N*', $v));
 
     // x64
-    if (PHP_INT_SIZE >= 8) {
-        if ($hi < 0) { // because php 5.2.2 to 5.2.5 is totally fucked up again
+    if (PHP_INT_SIZE>=8) {
+        if ($hi<0) { // because php 5.2.2 to 5.2.5 is totally fucked up again
             $hi += 1 << 32;
         }
-        if ($lo < 0) {
+        if ($lo<0) {
             $lo += 1 << 32;
         }
 
         return ($hi << 32) + $lo;
     }
 
-    if ($hi == 0) { // x32, int
-        if ($lo > 0) {
+    if ($hi==0) { // x32, int
+        if ($lo>0) {
             return $lo;
         }
         return sprintf('%u', $lo);
-    } elseif ($hi == -1) { // x32, int
-        if ($lo < 0) {
+    } elseif ($hi==-1) { // x32, int
+        if ($lo<0) {
             return $lo;
         }
         return sprintf('%.0f', $lo - 4294967296.0);
@@ -346,7 +346,7 @@ 
 
     $neg = '';
     $c = 0;
-    if ($hi < 0) {
+    if ($hi<0) {
         $hi = ~$hi;
         $lo = ~$lo;
         $c = 1;
@@ -358,7 +358,7 @@ 
 
     // x32, bcmath
     if (function_exists('bcmul')) {
-        return $neg . bcadd(bcadd($lo, bcmul($hi, '4294967296')), $c);
+        return $neg.bcadd(bcadd($lo, bcmul($hi, '4294967296')), $c);
     }
 
     // x32, no-bcmath
@@ -371,25 +371,25 @@ 
     $mq = floor($m / 10000000.0);
     $l = $m - $mq * 10000000.0 + $c;
     $h = $q * 4294967296.0 + $r * 429.0 + $mq;
-    if ($l == 10000000) {
+    if ($l==10000000) {
         $l = 0;
         $h += 1;
     }
 
     $h = sprintf('%.0f', $h);
     $l = sprintf('%07.0f', $l);
-    if ($h == '0') {
-        return $neg . sprintf('%.0f', (float)$l);
+    if ($h=='0') {
+        return $neg.sprintf('%.0f', (float)$l);
     }
-    return $neg . $h . $l;
+    return $neg.$h.$l;
 }
 
 
 function sphFixUint($value)
 {
-    if (PHP_INT_SIZE >= 8) {
+    if (PHP_INT_SIZE>=8) {
         // x64 route, workaround broken unpack() in 5.2.2+
-        if ($value < 0) {
+        if ($value<0) {
             $value += 1 << 32;
         }
         return $value;
@@ -471,7 +471,7 @@ 
 
     public function __destruct()
     {
-        if ($this->socket !== false) {
+        if ($this->socket!==false) {
             fclose($this->socket);
         }
     }
@@ -498,19 +498,19 @@ 
     public function setServer($host, $port = 0)
     {
         assert(is_string($host));
-        if ($host[0] == '/') {
-            $this->path = 'unix://' . $host;
+        if ($host[0]=='/') {
+            $this->path = 'unix://'.$host;
             return;
         }
-        if (substr($host, 0, 7) == 'unix://') {
+        if (substr($host, 0, 7)=='unix://') {
             $this->path = $host;
             return;
         }
 
         $this->host = $host;
         $port = intval($port);
-        assert(0 <= $port && $port < 65536);
-        $this->port = $port == 0 ? 9312 : $port;
+        assert(0<=$port && $port<65536);
+        $this->port = $port==0 ? 9312 : $port;
         $this->path = '';
     }
 
@@ -524,7 +524,7 @@ 
 
     protected function send($handle, $data, $length)
     {
-        if (feof($handle) || fwrite($handle, $data, $length) !== $length) {
+        if (feof($handle) || fwrite($handle, $data, $length)!==$length) {
             $this->error = 'connection unexpectedly closed (timed out?)';
             $this->conn_error = true;
             return false;
@@ -555,7 +555,7 @@ 
     /// connect to searchd server
     protected function connect()
     {
-        if ($this->socket !== false) {
+        if ($this->socket!==false) {
             // we are in persistent connection mode, so we have a socket
             // however, need to check whether it's still alive
             if (!@feof($this->socket)) {
@@ -578,7 +578,7 @@ 
             $port = $this->port;
         }
 
-        if ($this->timeout <= 0) {
+        if ($this->timeout<=0) {
             $fp = @fsockopen($host, $port, $errno, $errstr);
         } else {
             $fp = @fsockopen($host, $port, $errno, $errstr, $this->timeout);
@@ -610,7 +610,7 @@ 
         // check version
         list(, $v) = unpack('N*', fread($fp, 4));
         $v = (int)$v;
-        if ($v < 1) {
+        if ($v<1) {
             fclose($fp);
             $this->error = "expected searchd protocol version 1+, got version '$v'";
             return false;
@@ -626,10 +626,10 @@ 
         $len = 0;
 
         $header = fread($fp, 8);
-        if (strlen($header) == 8) {
+        if (strlen($header)==8) {
             list($status, $ver, $len) = array_values(unpack('n2a/Nb', $header));
             $left = $len;
-            while ($left > 0 && !feof($fp)) {
+            while ($left>0 && !feof($fp)) {
                 $chunk = fread($fp, min(8192, $left));
                 if ($chunk) {
                     $response .= $chunk;
@@ -637,13 +637,13 @@ 
                 }
             }
         }
-        if ($this->socket === false) {
+        if ($this->socket===false) {
             fclose($fp);
         }
 
         // check response
         $read = strlen($response);
-        if (!$response || $read != $len) {
+        if (!$response || $read!=$len) {
             $this->error = $len
                 ? "failed to read searchd response (status=$status, ver=$ver, len=$len, read=$read)"
                 : 'received zero-sized searchd response';
@@ -651,26 +651,26 @@ 
         }
 
         // check status
-        if ($status == SEARCHD_WARNING) {
+        if ($status==SEARCHD_WARNING) {
             list(, $wlen) = unpack('N*', substr($response, 0, 4));
             $this->warning = substr($response, 4, $wlen);
             return substr($response, 4 + $wlen);
         }
-        if ($status == SEARCHD_ERROR) {
-            $this->error = 'searchd error: ' . substr($response, 4);
+        if ($status==SEARCHD_ERROR) {
+            $this->error = 'searchd error: '.substr($response, 4);
             return false;
         }
-        if ($status == SEARCHD_RETRY) {
-            $this->error = 'temporary searchd error: ' . substr($response, 4);
+        if ($status==SEARCHD_RETRY) {
+            $this->error = 'temporary searchd error: '.substr($response, 4);
             return false;
         }
-        if ($status != SEARCHD_OK) {
+        if ($status!=SEARCHD_OK) {
             $this->error = "unknown status code '$status'";
             return false;
         }
 
         // check version
-        if ($ver < $client_ver) {
+        if ($ver<$client_ver) {
             $this->warning = sprintf(
                 'searchd command v.%d.%d older than client\'s v.%d.%d, some options might not work',
                 $ver >> 8,
@@ -693,15 +693,15 @@ 
     {
         assert(is_int($offset));
         assert(is_int($limit));
-        assert($offset >= 0);
-        assert($limit > 0);
-        assert($max >= 0);
+        assert($offset>=0);
+        assert($limit>0);
+        assert($max>=0);
         $this->offset = $offset;
         $this->limit = $limit;
-        if ($max > 0) {
+        if ($max>0) {
             $this->max_matches = $max;
         }
-        if ($cutoff > 0) {
+        if ($cutoff>0) {
             $this->cutoff = $cutoff;
         }
     }
@@ -711,7 +711,7 @@ 
     public function setMaxQueryTime($max)
     {
         assert(is_int($max));
-        assert($max >= 0);
+        assert($max>=0);
         $this->max_query_time = $max;
     }
 
@@ -723,21 +723,21 @@ 
             E_USER_DEPRECATED
         );
         assert(
-            $mode == SPH_MATCH_ALL ||
-            $mode == SPH_MATCH_ANY ||
-            $mode == SPH_MATCH_PHRASE ||
-            $mode == SPH_MATCH_BOOLEAN ||
-            $mode == SPH_MATCH_EXTENDED ||
-            $mode == SPH_MATCH_FULLSCAN ||
-            $mode == SPH_MATCH_EXTENDED2
+            $mode==SPH_MATCH_ALL ||
+            $mode==SPH_MATCH_ANY ||
+            $mode==SPH_MATCH_PHRASE ||
+            $mode==SPH_MATCH_BOOLEAN ||
+            $mode==SPH_MATCH_EXTENDED ||
+            $mode==SPH_MATCH_FULLSCAN ||
+            $mode==SPH_MATCH_EXTENDED2
         );
         $this->mode = $mode;
     }
 
     /// set ranking mode
-    public function setRankingMode($ranker, $rankexpr='')
+    public function setRankingMode($ranker, $rankexpr = '')
     {
-        assert($ranker === 0 || $ranker >= 1 && $ranker < SPH_RANK_TOTAL);
+        assert($ranker===0 || $ranker>=1 && $ranker<SPH_RANK_TOTAL);
         assert(is_string($rankexpr));
         $this->ranker = $ranker;
         $this->rank_expr = $rankexpr;
@@ -746,16 +746,16 @@ 
     /// set matches sorting mode
     public function setSortMode($mode, $sortby = '')
     {
-        assert (
-            $mode == SPH_SORT_RELEVANCE ||
-            $mode == SPH_SORT_ATTR_DESC ||
-            $mode == SPH_SORT_ATTR_ASC ||
-            $mode == SPH_SORT_TIME_SEGMENTS ||
-            $mode == SPH_SORT_EXTENDED ||
-            $mode == SPH_SORT_EXPR
+        assert(
+            $mode==SPH_SORT_RELEVANCE ||
+            $mode==SPH_SORT_ATTR_DESC ||
+            $mode==SPH_SORT_ATTR_ASC ||
+            $mode==SPH_SORT_TIME_SEGMENTS ||
+            $mode==SPH_SORT_EXTENDED ||
+            $mode==SPH_SORT_EXPR
         );
         assert(is_string($sortby));
-        assert($mode == SPH_SORT_RELEVANCE || strlen($sortby) > 0);
+        assert($mode==SPH_SORT_RELEVANCE || strlen($sortby)>0);
 
         $this->sort = $mode;
         $this->sort_by = $sortby;
@@ -799,7 +799,7 @@ 
     {
         assert(is_numeric($min));
         assert(is_numeric($max));
-        assert($min <= $max);
+        assert($min<=$max);
         $this->min_id = $min;
         $this->max_id = $max;
     }
@@ -847,7 +847,7 @@ 
         assert(is_string($attribute));
         assert(is_numeric($min));
         assert(is_numeric($max));
-        assert($min <= $max);
+        assert($min<=$max);
 
         $this->filters[] = array(
             'type' => SPH_FILTER_RANGE,
@@ -865,7 +865,7 @@ 
         assert(is_string($attribute));
         assert(is_float($min));
         assert(is_float($max));
-        assert($min <= $max);
+        assert($min<=$max);
 
         $this->filters[] = array(
             'type' => SPH_FILTER_FLOATRANGE,
@@ -900,12 +900,12 @@ 
         assert(is_string($attribute));
         assert(is_string($groupsort));
         assert(
-            $func == SPH_GROUPBY_DAY ||
-            $func == SPH_GROUPBY_WEEK ||
-            $func == SPH_GROUPBY_MONTH ||
-            $func == SPH_GROUPBY_YEAR ||
-            $func == SPH_GROUPBY_ATTR ||
-            $func == SPH_GROUPBY_ATTRPAIR
+            $func==SPH_GROUPBY_DAY ||
+            $func==SPH_GROUPBY_WEEK ||
+            $func==SPH_GROUPBY_MONTH ||
+            $func==SPH_GROUPBY_YEAR ||
+            $func==SPH_GROUPBY_ATTR ||
+            $func==SPH_GROUPBY_ATTRPAIR
         );
 
         $this->group_by = $attribute;
@@ -923,8 +923,8 @@ 
     /// set distributed retries count and delay
     public function setRetries($count, $delay = 0)
     {
-        assert(is_int($count) && $count >= 0);
-        assert(is_int($delay) && $delay >= 0);
+        assert(is_int($count) && $count>=0);
+        assert(is_int($delay) && $delay>=0);
         $this->retry_count = $count;
         $this->retry_delay = $delay;
     }
@@ -981,12 +981,12 @@ 
             'global_idf',
             'low_priority'
         );
-        $flags = array (
+        $flags = array(
             'reverse_scan' => array(0, 1),
             'sort_method' => array('pq', 'kbuffer'),
             'max_predicted_time' => array(0),
             'boolean_simplify' => array(true, false),
-            'idf' => array ('normalized', 'plain', 'tfidf_normalized', 'tfidf_unnormalized'),
+            'idf' => array('normalized', 'plain', 'tfidf_normalized', 'tfidf_unnormalized'),
             'global_idf' => array(true, false),
             'low_priority' => array(true, false)
         );
@@ -994,32 +994,32 @@ 
         assert(isset($flag_name, $known_names));
         assert(
             in_array($flag_value, $flags[$flag_name], true) ||
-            ($flag_name == 'max_predicted_time' && is_int($flag_value) && $flag_value >= 0)
+            ($flag_name=='max_predicted_time' && is_int($flag_value) && $flag_value>=0)
         );
 
-        if ($flag_name == 'reverse_scan') {
-            $this->query_flags = sphSetBit($this->query_flags, 0, $flag_value == 1);
+        if ($flag_name=='reverse_scan') {
+            $this->query_flags = sphSetBit($this->query_flags, 0, $flag_value==1);
         }
-        if ($flag_name == 'sort_method') {
-            $this->query_flags = sphSetBit($this->query_flags, 1, $flag_value == 'kbuffer');
+        if ($flag_name=='sort_method') {
+            $this->query_flags = sphSetBit($this->query_flags, 1, $flag_value=='kbuffer');
         }
-        if ($flag_name == 'max_predicted_time') {
-            $this->query_flags = sphSetBit($this->query_flags, 2, $flag_value > 0);
+        if ($flag_name=='max_predicted_time') {
+            $this->query_flags = sphSetBit($this->query_flags, 2, $flag_value>0);
             $this->predicted_time = (int)$flag_value;
         }
-        if ($flag_name == 'boolean_simplify') {
+        if ($flag_name=='boolean_simplify') {
             $this->query_flags = sphSetBit($this->query_flags, 3, $flag_value);
         }
-        if ($flag_name == 'idf' && ($flag_value == 'normalized' || $flag_value == 'plain')) {
-            $this->query_flags = sphSetBit($this->query_flags, 4, $flag_value == 'plain');
+        if ($flag_name=='idf' && ($flag_value=='normalized' || $flag_value=='plain')) {
+            $this->query_flags = sphSetBit($this->query_flags, 4, $flag_value=='plain');
         }
-        if ($flag_name == 'global_idf') {
+        if ($flag_name=='global_idf') {
             $this->query_flags = sphSetBit($this->query_flags, 5, $flag_value);
         }
-        if ($flag_name == 'idf' && ($flag_value == 'tfidf_normalized' || $flag_value == 'tfidf_unnormalized')) {
-            $this->query_flags = sphSetBit($this->query_flags, 6, $flag_value == 'tfidf_normalized');
+        if ($flag_name=='idf' && ($flag_value=='tfidf_normalized' || $flag_value=='tfidf_unnormalized')) {
+            $this->query_flags = sphSetBit($this->query_flags, 6, $flag_value=='tfidf_normalized');
         }
-        if ($flag_name == 'low_priority') {
+        if ($flag_name=='low_priority') {
             $this->query_flags = sphSetBit($this->query_flags, 8, $flag_value);
         }
     }
@@ -1030,8 +1030,8 @@ 
         assert(is_string($orderby));
         assert(is_int($offset));
         assert(is_int($limit));
-        assert($offset >= 0);
-        assert($limit > 0);
+        assert($offset>=0);
+        assert($limit>0);
 
         $this->outer_order_by = $orderby;
         $this->outer_offset = $offset;
@@ -1096,7 +1096,7 @@ 
 
         $this->error = $results[0]['error'];
         $this->warning = $results[0]['warning'];
-        if ($results[0]['status'] == SEARCHD_ERROR) {
+        if ($results[0]['status']==SEARCHD_ERROR) {
             return false;
         } else {
             return $results[0];
@@ -1120,24 +1120,24 @@ 
 
         // build request
         $req = pack('NNNNN', $this->query_flags, $this->offset, $this->limit, $this->mode, $this->ranker);
-        if ($this->ranker == SPH_RANK_EXPR) {
-            $req .= pack('N', strlen($this->rank_expr)) . $this->rank_expr;
+        if ($this->ranker==SPH_RANK_EXPR) {
+            $req .= pack('N', strlen($this->rank_expr)).$this->rank_expr;
         }
         $req .= pack('N', $this->sort); // (deprecated) sort mode
-        $req .= pack('N', strlen($this->sort_by)) . $this->sort_by;
-        $req .= pack('N', strlen($query)) . $query; // query itself
+        $req .= pack('N', strlen($this->sort_by)).$this->sort_by;
+        $req .= pack('N', strlen($query)).$query; // query itself
         $req .= pack('N', count($this->weights)); // weights
         foreach ($this->weights as $weight) {
             $req .= pack('N', (int)$weight);
         }
-        $req .= pack('N', strlen($index)) . $index; // indexes
+        $req .= pack('N', strlen($index)).$index; // indexes
         $req .= pack('N', 1); // id64 range marker
-        $req .= sphPackU64($this->min_id) . sphPackU64($this->max_id); // id64 range
+        $req .= sphPackU64($this->min_id).sphPackU64($this->max_id); // id64 range
 
         // filters
         $req .= pack('N', count($this->filters));
         foreach ($this->filters as $filter) {
-            $req .= pack('N', strlen($filter['attr'])) . $filter['attr'];
+            $req .= pack('N', strlen($filter['attr'])).$filter['attr'];
             $req .= pack('N', $filter['type']);
             switch ($filter['type']) {
                 case SPH_FILTER_VALUES:
@@ -1147,13 +1147,13 @@ 
                     }
                     break;
                 case SPH_FILTER_RANGE:
-                    $req .= sphPackI64($filter['min']) . sphPackI64($filter['max']);
+                    $req .= sphPackI64($filter['min']).sphPackI64($filter['max']);
                     break;
                 case SPH_FILTER_FLOATRANGE:
-                    $req .= $this->packFloat($filter['min']) . $this->packFloat($filter['max']);
+                    $req .= $this->packFloat($filter['min']).$this->packFloat($filter['max']);
                     break;
                 case SPH_FILTER_STRING:
-                    $req .= pack('N', strlen($filter['value'])) . $filter['value'];
+                    $req .= pack('N', strlen($filter['value'])).$filter['value'];
                     break;
                 default:
                     assert(0 && 'internal error: unhandled filter type');
@@ -1162,27 +1162,27 @@ 
         }
 
         // group-by clause, max-matches count, group-sort clause, cutoff count
-        $req .= pack('NN', $this->group_func, strlen($this->group_by)) . $this->group_by;
+        $req .= pack('NN', $this->group_func, strlen($this->group_by)).$this->group_by;
         $req .= pack('N', $this->max_matches);
-        $req .= pack('N', strlen($this->group_sort)) . $this->group_sort;
+        $req .= pack('N', strlen($this->group_sort)).$this->group_sort;
         $req .= pack('NNN', $this->cutoff, $this->retry_count, $this->retry_delay);
-        $req .= pack('N', strlen($this->group_distinct)) . $this->group_distinct;
+        $req .= pack('N', strlen($this->group_distinct)).$this->group_distinct;
 
         // anchor point
         if (empty($this->anchor)) {
             $req .= pack('N', 0);
         } else {
-            $a =& $this->anchor;
+            $a = & $this->anchor;
             $req .= pack('N', 1);
-            $req .= pack('N', strlen($a['attrlat'])) . $a['attrlat'];
-            $req .= pack('N', strlen($a['attrlong'])) . $a['attrlong'];
-            $req .= $this->packFloat($a['lat']) . $this->packFloat($a['long']);
+            $req .= pack('N', strlen($a['attrlat'])).$a['attrlat'];
+            $req .= pack('N', strlen($a['attrlong'])).$a['attrlong'];
+            $req .= $this->packFloat($a['lat']).$this->packFloat($a['long']);
         }
 
         // per-index weights
         $req .= pack('N', count($this->index_weights));
         foreach ($this->index_weights as $idx => $weight) {
-            $req .= pack('N', strlen($idx)) . $idx . pack('N', $weight);
+            $req .= pack('N', strlen($idx)).$idx.pack('N', $weight);
         }
 
         // max query time
@@ -1191,16 +1191,16 @@ 
         // per-field weights
         $req .= pack('N', count($this->field_weights));
         foreach ($this->field_weights as $field => $weight) {
-            $req .= pack('N', strlen($field)) . $field . pack('N', $weight);
+            $req .= pack('N', strlen($field)).$field.pack('N', $weight);
         }
 
         // comment
-        $req .= pack('N', strlen($comment)) . $comment;
+        $req .= pack('N', strlen($comment)).$comment;
 
         // attribute overrides
         $req .= pack('N', count($this->overrides));
         foreach ($this->overrides as $key => $entry) {
-            $req .= pack('N', strlen($entry['attr'])) . $entry['attr'];
+            $req .= pack('N', strlen($entry['attr'])).$entry['attr'];
             $req .= pack('NN', $entry['type'], count($entry['values']));
             foreach ($entry['values'] as $id => $val) {
                 assert(is_numeric($id));
@@ -1222,14 +1222,14 @@ 
         }
 
         // select-list
-        $req .= pack('N', strlen($this->select)) . $this->select;
+        $req .= pack('N', strlen($this->select)).$this->select;
 
         // max_predicted_time
-        if ($this->predicted_time > 0) {
+        if ($this->predicted_time>0) {
             $req .= pack('N', (int)$this->predicted_time);
         }
 
-        $req .= pack('N', strlen($this->outer_order_by)) . $this->outer_order_by;
+        $req .= pack('N', strlen($this->outer_order_by)).$this->outer_order_by;
         $req .= pack('NN', $this->outer_offset, $this->outer_limit);
         if ($this->has_outer) {
             $req .= pack('N', 1);
@@ -1265,7 +1265,7 @@ 
         $nreqs = count($this->reqs);
         $req = join('', $this->reqs);
         $len = 8 + strlen($req);
-        $req = pack('nnNNN', SEARCHD_COMMAND_SEARCH, VER_COMMAND_SEARCH, $len, 0, $nreqs) . $req; // add header
+        $req = pack('nnNNN', SEARCHD_COMMAND_SEARCH, VER_COMMAND_SEARCH, $len, 0, $nreqs).$req; // add header
 
         if (!$this->send($fp, $req, $len + 8) || !($response = $this->getResponse($fp, VER_COMMAND_SEARCH))) {
             $this->mbPop();
@@ -1286,9 +1286,9 @@ 
         $max = strlen($response); // max position for checks, to protect against broken responses
 
         $results = array();
-        for ($ires = 0; $ires < $nreqs && $p < $max; $ires++) {
+        for ($ires = 0; $ires<$nreqs && $p<$max; $ires++) {
             $results[] = array();
-            $result =& $results[$ires];
+            $result = & $results[$ires];
 
             $result['error'] = '';
             $result['warning'] = '';
@@ -1297,13 +1297,13 @@ 
             list(, $status) = unpack('N*', substr($response, $p, 4));
             $p += 4;
             $result['status'] = $status;
-            if ($status != SEARCHD_OK) {
+            if ($status!=SEARCHD_OK) {
                 list(, $len) = unpack('N*', substr($response, $p, 4));
                 $p += 4;
                 $message = substr($response, $p, $len);
                 $p += $len;
 
-                if ($status == SEARCHD_WARNING) {
+                if ($status==SEARCHD_WARNING) {
                     $result['warning'] = $message;
                 } else {
                     $result['error'] = $message;
@@ -1317,7 +1317,7 @@ 
 
             list(, $nfields) = unpack('N*', substr($response, $p, 4));
             $p += 4;
-            while ($nfields --> 0 && $p < $max) {
+            while ($nfields-->0 && $p<$max) {
                 list(, $len) = unpack('N*', substr($response, $p, 4));
                 $p += 4;
                 $fields[] = substr($response, $p, $len);
@@ -1327,7 +1327,7 @@ 
 
             list(, $nattrs) = unpack('N*', substr($response, $p, 4));
             $p += 4;
-            while ($nattrs --> 0 && $p < $max) {
+            while ($nattrs-->0 && $p<$max) {
                 list(, $len) = unpack('N*', substr($response, $p, 4));
                 $p += 4;
                 $attr = substr($response, $p, $len);
@@ -1346,7 +1346,7 @@ 
 
             // read matches
             $idx = -1;
-            while ($count --> 0 && $p < $max) {
+            while ($count-->0 && $p<$max) {
                 // index into result array
                 $idx++;
 
@@ -1374,14 +1374,14 @@ 
                 $attrvals = array();
                 foreach ($attrs as $attr => $type) {
                     // handle 64bit ints
-                    if ($type == SPH_ATTR_BIGINT) {
+                    if ($type==SPH_ATTR_BIGINT) {
                         $attrvals[$attr] = sphUnpackI64(substr($response, $p, 8));
                         $p += 8;
                         continue;
                     }
 
                     // handle floats
-                    if ($type == SPH_ATTR_FLOAT) {
+                    if ($type==SPH_ATTR_FLOAT) {
                         list(, $uval) = unpack('N*', substr($response, $p, 4));
                         $p += 4;
                         list(, $fval) = unpack('f*', pack('L', $uval));
@@ -1392,28 +1392,28 @@ 
                     // handle everything else as unsigned ints
                     list(, $val) = unpack('N*', substr($response, $p, 4));
                     $p += 4;
-                    if ($type == SPH_ATTR_MULTI) {
+                    if ($type==SPH_ATTR_MULTI) {
                         $attrvals[$attr] = array();
                         $nvalues = $val;
-                        while ($nvalues --> 0 && $p < $max) {
+                        while ($nvalues-->0 && $p<$max) {
                             list(, $val) = unpack('N*', substr($response, $p, 4));
                             $p += 4;
                             $attrvals[$attr][] = sphFixUint($val);
                         }
-                    } elseif ($type == SPH_ATTR_MULTI64) {
+                    } elseif ($type==SPH_ATTR_MULTI64) {
                         $attrvals[$attr] = array();
                         $nvalues = $val;
-                        while ($nvalues > 0 && $p < $max) {
+                        while ($nvalues>0 && $p<$max) {
                             $attrvals[$attr][] = sphUnpackI64(substr($response, $p, 8));
                             $p += 8;
                             $nvalues -= 2;
                         }
-                    } elseif ($type == SPH_ATTR_STRING) {
+                    } elseif ($type==SPH_ATTR_STRING) {
                         $attrvals[$attr] = substr($response, $p, $val);
                         $p += $val;
-                    } elseif ($type == SPH_ATTR_FACTORS) {
+                    } elseif ($type==SPH_ATTR_FACTORS) {
                         $attrvals[$attr] = substr($response, $p, $val - 4);
-                        $p += $val-4;
+                        $p += $val - 4;
                     } else {
                         $attrvals[$attr] = sphFixUint($val);
                     }
@@ -1432,14 +1432,14 @@ 
             $result['time'] = sprintf('%.3f', $msecs / 1000);
             $p += 16;
 
-            while ($words --> 0 && $p < $max) {
+            while ($words-->0 && $p<$max) {
                 list(, $len) = unpack('N*', substr($response, $p, 4));
                 $p += 4;
                 $word = substr($response, $p, $len);
                 $p += $len;
                 list($docs, $hits) = array_values(unpack('N*N*', substr($response, $p, 8)));
                 $p += 8;
-                $result['words'][$word] = array (
+                $result['words'][$word] = array(
                     'docs' => sprintf('%u', $docs),
                     'hits' => sprintf('%u', $hits)
                 );
@@ -1574,23 +1574,23 @@ 
             $flags |= 1024;
         }
         $req = pack('NN', 0, $flags); // mode=0, flags=$flags
-        $req .= pack('N', strlen($index)) . $index; // req index
-        $req .= pack('N', strlen($words)) . $words; // req words
+        $req .= pack('N', strlen($index)).$index; // req index
+        $req .= pack('N', strlen($words)).$words; // req words
 
         // options
-        $req .= pack('N', strlen($opts['before_match'])) . $opts['before_match'];
-        $req .= pack('N', strlen($opts['after_match'])) . $opts['after_match'];
-        $req .= pack('N', strlen($opts['chunk_separator'])) . $opts['chunk_separator'];
+        $req .= pack('N', strlen($opts['before_match'])).$opts['before_match'];
+        $req .= pack('N', strlen($opts['after_match'])).$opts['after_match'];
+        $req .= pack('N', strlen($opts['chunk_separator'])).$opts['chunk_separator'];
         $req .= pack('NN', (int)$opts['limit'], (int)$opts['around']);
         $req .= pack('NNN', (int)$opts['limit_passages'], (int)$opts['limit_words'], (int)$opts['start_passage_id']); // v.1.2
-        $req .= pack('N', strlen($opts['html_strip_mode'])) . $opts['html_strip_mode'];
-        $req .= pack('N', strlen($opts['passage_boundary'])) . $opts['passage_boundary'];
+        $req .= pack('N', strlen($opts['html_strip_mode'])).$opts['html_strip_mode'];
+        $req .= pack('N', strlen($opts['passage_boundary'])).$opts['passage_boundary'];
 
         // documents
         $req .= pack('N', count($docs));
         foreach ($docs as $doc) {
             assert(is_string($doc));
-            $req .= pack('N', strlen($doc)) . $doc;
+            $req .= pack('N', strlen($doc)).$doc;
         }
 
         ////////////////////////////
@@ -1598,7 +1598,7 @@ 
         ////////////////////////////
 
         $len = strlen($req);
-        $req = pack('nnN', SEARCHD_COMMAND_EXCERPT, VER_COMMAND_EXCERPT, $len) . $req; // add header
+        $req = pack('nnN', SEARCHD_COMMAND_EXCERPT, VER_COMMAND_EXCERPT, $len).$req; // add header
         if (!$this->send($fp, $req, $len + 8) || !($response = $this->getResponse($fp, VER_COMMAND_EXCERPT))) {
             $this->mbPop();
             return false;
@@ -1616,7 +1616,7 @@ 
             list(, $len) = unpack('N*', substr($response, $pos, 4));
             $pos += 4;
 
-            if ($pos + $len > $rlen) {
+            if ($pos + $len>$rlen) {
                 $this->error = 'incomplete reply';
                 $this->mbPop();
                 return false;
@@ -1655,8 +1655,8 @@ 
         /////////////////
 
         // v.1.0 req
-        $req  = pack('N', strlen($query)) . $query; // req query
-        $req .= pack('N', strlen($index)) . $index; // req index
+        $req  = pack('N', strlen($query)).$query; // req query
+        $req .= pack('N', strlen($index)).$index; // req index
         $req .= pack('N', (int)$hits);
 
         ////////////////////////////
@@ -1664,7 +1664,7 @@ 
         ////////////////////////////
 
         $len = strlen($req);
-        $req = pack('nnN', SEARCHD_COMMAND_KEYWORDS, VER_COMMAND_KEYWORDS, $len) . $req; // add header
+        $req = pack('nnN', SEARCHD_COMMAND_KEYWORDS, VER_COMMAND_KEYWORDS, $len).$req; // add header
         if (!$this->send($fp, $req, $len + 8) || !($response = $this->getResponse($fp, VER_COMMAND_KEYWORDS))) {
             $this->mbPop();
             return false;
@@ -1679,7 +1679,7 @@ 
         $rlen = strlen($response);
         list(, $nwords) = unpack('N*', substr($response, $pos, 4));
         $pos += 4;
-        for ($i = 0; $i < $nwords; $i++) {
+        for ($i = 0; $i<$nwords; $i++) {
             list(, $len) = unpack('N*', substr($response, $pos, 4));
             $pos += 4;
             $tokenized = $len ? substr($response, $pos, $len) : '';
@@ -1702,7 +1702,7 @@ 
                 $res[$i]['hits'] = $nhits;
             }
 
-            if ($pos > $rlen) {
+            if ($pos>$rlen) {
                 $this->error = 'incomplete reply';
                 $this->mbPop();
                 return false;
@@ -1715,8 +1715,8 @@ 
 
     public function escapeString($string)
     {
-        $from = array('\\', '(',')','|','-','!','@','~','"','&', '/', '^', '$', '=', '<');
-        $to   = array('\\\\', '\(','\)','\|','\-','\!','\@','\~','\"', '\&', '\/', '\^', '\$', '\=', '\<');
+        $from = array('\\', '(', ')', '|', '-', '!', '@', '~', '"', '&', '/', '^', '$', '=', '<');
+        $to   = array('\\\\', '\(', '\)', '\|', '\-', '\!', '\@', '\~', '\"', '\&', '\/', '\^', '\$', '\=', '\<');
 
         return str_replace($from, $to, $string);
     }
@@ -1743,7 +1743,7 @@ 
         foreach ($values as $id => $entry) {
             assert(is_numeric($id));
             assert(is_array($entry));
-            assert(count($entry) == count($attrs));
+            assert(count($entry)==count($attrs));
             foreach ($entry as $v) {
                 if ($mva) {
                     assert(is_array($v));
@@ -1758,12 +1758,12 @@ 
 
         // build request
         $this->mbPush();
-        $req = pack('N', strlen($index)) . $index;
+        $req = pack('N', strlen($index)).$index;
 
         $req .= pack('N', count($attrs));
         $req .= pack('N', $ignorenonexistent ? 1 : 0);
         foreach ($attrs as $attr) {
-            $req .= pack('N', strlen($attr)) . $attr;
+            $req .= pack('N', strlen($attr)).$attr;
             $req .= pack('N', $mva ? 1 : 0);
         }
 
@@ -1787,7 +1787,7 @@ 
         }
 
         $len = strlen($req);
-        $req = pack('nnN', SEARCHD_COMMAND_UPDATE, VER_COMMAND_UPDATE, $len) . $req; // add header
+        $req = pack('nnN', SEARCHD_COMMAND_UPDATE, VER_COMMAND_UPDATE, $len).$req; // add header
         if (!$this->send($fp, $req, $len + 8)) {
             $this->mbPop();
             return -1;
@@ -1810,7 +1810,7 @@ 
 
     public function open()
     {
-        if ($this->socket !== false) {
+        if ($this->socket!==false) {
             $this->error = 'already connected';
             return false;
         }
@@ -1829,7 +1829,7 @@ 
 
     public function close()
     {
-        if ($this->socket === false) {
+        if ($this->socket===false) {
             $this->error = 'not connected';
             return false;
         }
@@ -1866,8 +1866,8 @@ 
         $p += 8;
 
         $res = array();
-        for ($i = 0; $i < $rows; $i++) {
-            for ($j = 0; $j < $cols; $j++) {
+        for ($i = 0; $i<$rows; $i++) {
+            for ($j = 0; $j<$cols; $j++) {
                 list(, $len) = unpack('N*', substr($response, $p, 4));
                 $p += 4;
                 $res[$i][] = substr($response, $p, $len);
@@ -1898,7 +1898,7 @@ 
         }
 
         $tag = -1;
-        if (strlen($response) == 4) {
+        if (strlen($response)==4) {
             list(, $tag) = unpack('N*', $response);
         } else {
             $this->error = 'unexpected response length';