Ysurac / FlightAirMap

require/class.AIS.php

Doc Comments +25 added lines

@@ -68,6 +68,10 @@ 
        't', 'u', 'v', 'w' // 119
     ); // char 64
     */
+
+	/**
+	 * @param integer $ascii
+	 */
 	private function asciidec_2_8bit($ascii) {
 		//only process in the following range: 48-87, 96-119
 		if ($ascii < 48) { }
@@ -93,6 +97,10 @@ 
 		return(substr($bin, -6)); 
 	}
 
+	/**
+	 * @param integer $_start
+	 * @param integer $_size
+	 */
 	private function binchar($_str, $_start, $_size) {
 		//  ' ' --- '?', // 0x20 - 0x3F
 		//  '@' --- '_', // 0x40 - 0x5F
@@ -118,6 +126,10 @@ 
 	}
 
 	// function for decoding the AIS Message ITU Payload
+
+	/**
+	 * @param string $_aisdata
+	 */
 	private function decode_ais($_aisdata) {
 		$ro = new stdClass(); // return object
 		$ro->cls = 0; // AIS class undefined, also indicate unparsed msg
@@ -351,6 +363,12 @@ 
 		elseif ($code == 99) return 'Other Type, no additional information';
 	}
 
+	/**
+	 * @param string $_itu
+	 * @param integer $_len
+	 * @param integer $_filler
+	 * @param string $aux
+	 */
 	public function process_ais_itu($_itu, $_len, $_filler, $aux /*, $ais_ch*/) {
 		global $port; // tcpip port...
 		
@@ -371,6 +389,10 @@ 
 
 	// char* - AIS \r terminated string
 	// TCP based streams which send messages in full can use this instead of calling process_ais_buf
+
+	/**
+	 * @param string $rawdata
+	 */
 	public function process_ais_raw($rawdata, $aux = '') { // return int
 		static $num_seq; // 1 to 9
 		static $seq; // 1 to 9
@@ -589,6 +611,9 @@ 
 		return $result;
 	}
 
+	/**
+	 * @param string $mmsi
+	 */
 	public function mmsitype($mmsi) {
 		if (strlen($mmsi) == 9) {
 			if (substr($mmsi,0,3) == '974') return 'EPIRB (Emergency Position Indicating Radio Beacon) AIS';

Spacing +128 added lines, -128 removed lines

@@ -29,31 +29,31 @@ 
 
 	private function make_latf($temp) { // unsigned long 
 		$flat = 0.0; // float
-		$temp = $temp & 0x07FFFFFF;
-		if ($temp & 0x04000000) {
-			$temp = $temp ^ 0x07FFFFFF;
+		$temp = $temp&0x07FFFFFF;
+		if ($temp&0x04000000) {
+			$temp = $temp^0x07FFFFFF;
 			$temp += 1;
-			$flat = (float)($temp / (60.0 * 10000.0));
+			$flat = (float) ($temp/(60.0*10000.0));
 			$flat *= -1.0;
-		} else $flat = (float)($temp / (60.0 * 10000.0));
+		} else $flat = (float) ($temp/(60.0*10000.0));
 		return $flat; // float
 	}
 
 	private function make_lonf($temp) { // unsigned long
 		$flon = 0.0; // float
-		$temp = $temp & 0x0FFFFFFF;
-		if ($temp & 0x08000000) {
-			$temp = $temp ^ 0x0FFFFFFF;
+		$temp = $temp&0x0FFFFFFF;
+		if ($temp&0x08000000) {
+			$temp = $temp^0x0FFFFFFF;
 			$temp += 1;
-			$flon = (float)($temp / (60.0 * 10000.0));
+			$flon = (float) ($temp/(60.0*10000.0));
 			$flon *= -1.0;
-		} else $flon = (float)($temp / (60.0 * 10000.0));
+		} else $flon = (float) ($temp/(60.0*10000.0));
 		return $flon;
 	}
 
 	private function ascii_2_dec($chr) {
-		$dec=ord($chr);//get decimal ascii code
-		$hex=dechex($dec);//convert decimal to hex
+		$dec = ord($chr); //get decimal ascii code
+		$hex = dechex($dec); //convert decimal to hex
 		return ($dec);
 	}
 	
@@ -72,15 +72,15 @@ 
 		//only process in the following range: 48-87, 96-119
 		if ($ascii < 48) { }
 		else {
-			if($ascii>119) { }
+			if ($ascii > 119) { }
 			else {
-				if ($ascii>87 && $ascii<96) ;
+				if ($ascii > 87 && $ascii < 96);
 				else {
-					$ascii=$ascii+40;
-					if ($ascii>128){
-						$ascii=$ascii+32;
+					$ascii = $ascii + 40;
+					if ($ascii > 128) {
+						$ascii = $ascii + 32;
 					} else {
-						$ascii=$ascii+40;
+						$ascii = $ascii + 40;
 					}
 				}
 			}
@@ -89,7 +89,7 @@ 
 	}
 
 	private function dec_2_6bit($dec) {
-		$bin=decbin($dec);
+		$bin = decbin($dec);
 		return(substr($bin, -6)); 
 	}
 
@@ -107,11 +107,11 @@ 
 		);
 		// "
 		$rv = '';
-		if ($_size % 6 == 0) {
-			$len = $_size / 6;
-			for ($i=0; $i<$len; $i++) {
-				$offset = $i * 6;
-				$rv .= $ais_chars[ bindec(substr($_str,$_start + $offset,6)) ];
+		if ($_size%6 == 0) {
+			$len = $_size/6;
+			for ($i = 0; $i < $len; $i++) {
+				$offset = $i*6;
+				$rv .= $ais_chars[bindec(substr($_str, $_start + $offset, 6))];
 			}
 		}
 		return $rv;
@@ -138,93 +138,93 @@ 
 		$ro->eta_hour = '';
 		$ro->eta_minute = '';
 		$ro->ts = time();
-		$ro->id = bindec(substr($_aisdata,0,6));
-		$ro->mmsi = bindec(substr($_aisdata,8,30));
+		$ro->id = bindec(substr($_aisdata, 0, 6));
+		$ro->mmsi = bindec(substr($_aisdata, 8, 30));
 		if ($ro->id >= 1 && $ro->id <= 3) {
-			$ro->cog = bindec(substr($_aisdata,116,12))/10;
-			$ro->sog = bindec(substr($_aisdata,50,10))/10;
-			$ro->lon = $this->make_lonf(bindec(substr($_aisdata,61,28)));
-			$ro->lat = $this->make_latf(bindec(substr($_aisdata,89,27)));
+			$ro->cog = bindec(substr($_aisdata, 116, 12))/10;
+			$ro->sog = bindec(substr($_aisdata, 50, 10))/10;
+			$ro->lon = $this->make_lonf(bindec(substr($_aisdata, 61, 28)));
+			$ro->lat = $this->make_latf(bindec(substr($_aisdata, 89, 27)));
 			$ro->cls = 1; // class A
 		} else if ($ro->id == 4) {
-			$ro->lon = $this->make_lonf(bindec(substr($_aisdata,79,28)));
-			$ro->lat = $this->make_latf(bindec(substr($_aisdata,107,27)));
+			$ro->lon = $this->make_lonf(bindec(substr($_aisdata, 79, 28)));
+			$ro->lat = $this->make_latf(bindec(substr($_aisdata, 107, 27)));
 			$ro->cls = 1; // class A
 		} else if ($ro->id == 5) {
-			$ro->imo = bindec(substr($_aisdata,40,30));
-			$ro->callsign = $this->binchar($_aisdata,70,42);
-			$ro->name = $this->binchar($_aisdata,112,120);
-			$ro->typeid = bindec(substr($_aisdata,232,8));
+			$ro->imo = bindec(substr($_aisdata, 40, 30));
+			$ro->callsign = $this->binchar($_aisdata, 70, 42);
+			$ro->name = $this->binchar($_aisdata, 112, 120);
+			$ro->typeid = bindec(substr($_aisdata, 232, 8));
 			$ro->type = $this->getShipType($ro->typeid);
 			//$ro->to_bow = bindec(substr($_aisdata,240,9));
 			//$ro->to_stern = bindec(substr($_aisdata,249,9));
 			//$ro->to_port = bindec(substr($_aisdata,258,6));
 			//$ro->to_starboard = bindec(substr($_aisdata,264,6));
-			$ro->eta_month = bindec(substr($_aisdata,274,4));
-			$ro->eta_day = bindec(substr($_aisdata,278,5));
-			$ro->eta_hour = bindec(substr($_aisdata,283,5));
-			$ro->eta_minute = bindec(substr($_aisdata,288,6));
+			$ro->eta_month = bindec(substr($_aisdata, 274, 4));
+			$ro->eta_day = bindec(substr($_aisdata, 278, 5));
+			$ro->eta_hour = bindec(substr($_aisdata, 283, 5));
+			$ro->eta_minute = bindec(substr($_aisdata, 288, 6));
 			//$ro->draught = bindec(substr($_aisdata,294,8));
-			$ro->destination = $this->binchar($_aisdata,302,120);
+			$ro->destination = $this->binchar($_aisdata, 302, 120);
 			$ro->cls = 1; // class A
 		} else if ($ro->id == 9) {
 			// Search and Rescue aircraft position report
 		} else if ($ro->id == 18) {
-			$ro->cog = bindec(substr($_aisdata,112,12))/10;
-			$ro->sog = bindec(substr($_aisdata,46,10))/10;
-			$ro->lon = $this->make_lonf(bindec(substr($_aisdata,57,28)));
-			$ro->lat = $this->make_latf(bindec(substr($_aisdata,85,27)));
-			$ro->heading = bindec(substr($_aisdata,124,9));
+			$ro->cog = bindec(substr($_aisdata, 112, 12))/10;
+			$ro->sog = bindec(substr($_aisdata, 46, 10))/10;
+			$ro->lon = $this->make_lonf(bindec(substr($_aisdata, 57, 28)));
+			$ro->lat = $this->make_latf(bindec(substr($_aisdata, 85, 27)));
+			$ro->heading = bindec(substr($_aisdata, 124, 9));
 			if ($ro->heading == 511) $ro->heading = '';
 			$ro->cls = 2; // class B
 		} else if ($ro->id == 19) {
-			$ro->cog = bindec(substr($_aisdata,112,12))/10;
-			$ro->sog = bindec(substr($_aisdata,46,10))/10;
-			$ro->lon = $this->make_lonf(bindec(substr($_aisdata,61,28)));
-			$ro->lat = $this->make_latf(bindec(substr($_aisdata,89,27)));
-			$ro->name = $this->binchar($_aisdata,143,120);
+			$ro->cog = bindec(substr($_aisdata, 112, 12))/10;
+			$ro->sog = bindec(substr($_aisdata, 46, 10))/10;
+			$ro->lon = $this->make_lonf(bindec(substr($_aisdata, 61, 28)));
+			$ro->lat = $this->make_latf(bindec(substr($_aisdata, 89, 27)));
+			$ro->name = $this->binchar($_aisdata, 143, 120);
 			$ro->cls = 2; // class B
-			$ro->heading = bindec(substr($_aisdata,124,9));
+			$ro->heading = bindec(substr($_aisdata, 124, 9));
 			if ($ro->heading == 511) $ro->heading = '';
-			$ro->typeid = bindec(substr($_aisdata,263,8));
+			$ro->typeid = bindec(substr($_aisdata, 263, 8));
 			$ro->type = $this->getShipType($ro->typeid);
 			//$ro->to_bow = bindec(substr($_aisdata,271,9));
 			//$ro->to_stern = bindec(substr($_aisdata,280,9));
 			//$ro->to_port = bindec(substr($_aisdata,289,6));
 			//$ro->to_starboard = bindec(substr($_aisdata,295,6));
 		} else if ($ro->id == 21) {
-			$ro->lon = $this->make_lonf(bindec(substr($_aisdata,164,28)));
-			$ro->lat = $this->make_latf(bindec(substr($_aisdata,192,27)));
-			$ro->name = $this->binchar($_aisdata,43,120);
+			$ro->lon = $this->make_lonf(bindec(substr($_aisdata, 164, 28)));
+			$ro->lat = $this->make_latf(bindec(substr($_aisdata, 192, 27)));
+			$ro->name = $this->binchar($_aisdata, 43, 120);
 			//$ro->to_bow = bindec(substr($_aisdata,219,9));
 			//$ro->to_stern = bindec(substr($_aisdata,228,9));
 			//$ro->to_port = bindec(substr($_aisdata,237,6));
 			//$ro->to_starboard = bindec(substr($_aisdata,243,6));
 			$ro->cls = 2; // class B
 		} else if ($ro->id == 24) {
-			$pn = bindec(substr($_aisdata,38,2));
+			$pn = bindec(substr($_aisdata, 38, 2));
 			if ($pn == 0) {
-				$ro->name = $this->binchar($_aisdata,40,120);
+				$ro->name = $this->binchar($_aisdata, 40, 120);
 			}
-			$ro->typeid = bindec(substr($_aisdata,40,8));
+			$ro->typeid = bindec(substr($_aisdata, 40, 8));
 			$ro->type = $this->getShipType($ro->typeid);
-			$ro->callsign = $this->binchar($_aisdata,90,42);
+			$ro->callsign = $this->binchar($_aisdata, 90, 42);
 			//$ro->to_bow = bindec(substr($_aisdata,132,9));
 			//$ro->to_stern = bindec(substr($_aisdata,141,9));
 			//$ro->to_port = bindec(substr($_aisdata,150,6));
 			//$ro->to_starboard = bindec(substr($_aisdata,156,6));
 			$ro->cls = 2; // class B
 		} else if ($ro->id == 27) {
-			$ro->cog = bindec(substr($_aisdata,85,9));
+			$ro->cog = bindec(substr($_aisdata, 85, 9));
 			if ($ro->cog == 511) $ro->cog = 0.0;
-			$ro->sog = bindec(substr($_aisdata,79,6));
+			$ro->sog = bindec(substr($_aisdata, 79, 6));
 			if ($ro->sog == 63) $ro->sog = 0.0;
-			$ro->lon = $this->make_lonf(bindec(substr($_aisdata,44,18))*10);
-			$ro->lat = $this->make_latf(bindec(substr($_aisdata,62,17))*10);
+			$ro->lon = $this->make_lonf(bindec(substr($_aisdata, 44, 18))*10);
+			$ro->lat = $this->make_latf(bindec(substr($_aisdata, 62, 17))*10);
 			$ro->cls = 1; // class A
 		
 		}
-		$ro->statusid = bindec(substr($_aisdata,38,4));
+		$ro->statusid = bindec(substr($_aisdata, 38, 4));
 		$ro->status = $this->getStatus($ro->statusid);
 		//var_dump($ro); // dump results here for demo purpose
 		return $ro;
@@ -355,14 +355,14 @@ 
 		global $port; // tcpip port...
 		
 		static $debug_counter = 0;
-		$aisdata168='';//six bit array of ascii characters
+		$aisdata168 = ''; //six bit array of ascii characters
 		$ais_nmea_array = str_split($_itu); // convert to an array
 		foreach ($ais_nmea_array as $value) {
 			$dec = $this->ascii_2_dec($value);
 			$bit8 = $this->asciidec_2_8bit($dec);
 			$bit6 = $this->dec_2_6bit($bit8);
 			//echo $value ."-" .$bit6 ."";
-			$aisdata168 .=$bit6;
+			$aisdata168 .= $bit6;
 		}
 		//echo $aisdata168 . "<br/>";
 		//return $this->decode_ais($aisdata168, $aux);
@@ -385,24 +385,24 @@ 
 		// calculate checksum after ! till *
 		// assume 1st ! is valid
 		// find * ensure that it is at correct position
-		$end = strrpos ( $rawdata , '*' );
+		$end = strrpos($rawdata, '*');
 		if ($end === FALSE) return -1; // check for NULLS!!!
-		$cs = substr( $rawdata, $end + 1 );
-		if ( strlen($cs) != 2 ) return -1; // correct cs length
-		$dcs = (int)hexdec( $cs );
-		for ( $alias=1; $alias<$end; $alias++) $chksum ^= ord( $rawdata[$alias] ); // perform XOR for NMEA checksum
-		if ( $chksum == $dcs ) { // NMEA checksum pass
+		$cs = substr($rawdata, $end + 1);
+		if (strlen($cs) != 2) return -1; // correct cs length
+		$dcs = (int) hexdec($cs);
+		for ($alias = 1; $alias < $end; $alias++) $chksum ^= ord($rawdata[$alias]); // perform XOR for NMEA checksum
+		if ($chksum == $dcs) { // NMEA checksum pass
 			$pcs = explode(',', $rawdata);
 			// !AI??? identifier
 			if (!isset($pcs[1])) {
 				echo "ERROR,INVALID_DATA ".time()." $rawdata\n";
 				return -1;
 			}
-			$num_seq = (int)$pcs[1]; // number of sequences
-			$seq = (int)$pcs[2]; // get sequence
+			$num_seq = (int) $pcs[1]; // number of sequences
+			$seq = (int) $pcs[2]; // get sequence
 			// get msg sequence id
 			if ($pcs[3] == '') $msg_sid = -1; // non-multipart message, set to -1
-			else $msg_sid = (int)$pcs[3]; // multipart message
+			else $msg_sid = (int) $pcs[3]; // multipart message
 			$ais_ch = $pcs[4]; // get AIS channel
 			// message sequence checking
 			if ($num_seq < 1 || $num_seq > 9) {
@@ -435,7 +435,7 @@ 
 					}
 				}
 				$itu = $itu.$pcs[5]; // get itu message
-				$filler += (int)$pcs[6][0]; // get filler
+				$filler += (int) $pcs[6][0]; // get filler
 				if ($num_seq == 1 // valid single message
 				    || $num_seq == $pseq // valid multi-part message
 				) {
@@ -455,13 +455,13 @@ 
 		$cbuf = $cbuf.$ibuf;
 		$last_pos = 0;
 		$result = new stdClass();
-		while ( ($start = strpos($cbuf,"VDM",$last_pos)) !== FALSE) {
+		while (($start = strpos($cbuf, "VDM", $last_pos)) !== FALSE) {
 		//while ( ($start = strpos($cbuf,"!AI",$last_pos)) !== FALSE) {
 			//DEBUG echo $cbuf;
-			if ( ($end = strpos($cbuf,"\r\n", $start)) !== FALSE) { //TBD need to trim?
+			if (($end = strpos($cbuf, "\r\n", $start)) !== FALSE) { //TBD need to trim?
 				$tst = substr($cbuf, $start - 3, ($end - $start + 3));
 				//DEBUG echo "[$start $end $tst]\n";
-				$result = $this->process_ais_raw( $tst, "" );
+				$result = $this->process_ais_raw($tst, "");
 				$last_pos = $end + 1;
 			} else break;
 		}
@@ -473,41 +473,41 @@ 
 	// incoming data from serial or IP comms
 	public function process_ais_line($cbuf) {
 		$result = new stdClass();
-		$start = strpos($cbuf,"VDM");
+		$start = strpos($cbuf, "VDM");
 		$tst = substr($cbuf, $start - 3);
-		$result = $this->process_ais_raw( $tst, "" );
+		$result = $this->process_ais_raw($tst, "");
 		return $result;
 	}
 
 	/* AIS Encoding
 	*/
-	private function mk_ais_lat( $lat ) {
+	private function mk_ais_lat($lat) {
 		//$lat = 1.2569;
-		if ($lat<0.0) {
+		if ($lat < 0.0) {
 			$lat = -$lat;
-			$neg=true;
-		} else $neg=false;
+			$neg = true;
+		} else $neg = false;
 		$latd = 0x00000000;
-		$latd = intval ($lat * 600000.0);
-		if ($neg==true) {
+		$latd = intval($lat*600000.0);
+		if ($neg == true) {
 			$latd = ~$latd;
-			$latd+=1;
+			$latd += 1;
 			$latd &= 0x07FFFFFF;
 		}
 		return $latd;
 	}
 
-	private function mk_ais_lon( $lon ) {
+	private function mk_ais_lon($lon) {
 		//$lon = 103.851;
-		if ($lon<0.0) {
+		if ($lon < 0.0) {
 			$lon = -$lon;
-			$neg=true;
-		} else $neg=false;
+			$neg = true;
+		} else $neg = false;
 		$lond = 0x00000000;
-		$lond = intval ($lon * 600000.0);
-		if ($neg==true) {
+		$lond = intval($lon*600000.0);
+		if ($neg == true) {
 			$lond = ~$lond;
-			$lond+=1;
+			$lond += 1;
 			$lond &= 0x0FFFFFFF;
 		}
 		return $lond;
@@ -515,8 +515,8 @@ 
 
 	private function char2bin($name, $max_len) {
 		$len = strlen($name);
-		if ($len > $max_len) $name = substr($name,0,$max_len);
-		if ($len < $max_len) $pad = str_repeat('0', ($max_len - $len) * 6);
+		if ($len > $max_len) $name = substr($name, 0, $max_len);
+		if ($len < $max_len) $pad = str_repeat('0', ($max_len - $len)*6);
 		else $pad = '';
 		$rv = '';
 		$ais_chars = array(
@@ -533,26 +533,26 @@ 
 		if ($_a) foreach ($_a as $_1) {
 			if (isset($ais_chars[$_1])) $dec = $ais_chars[$_1];
 			else $dec = 0;
-			$bin = str_pad(decbin( $dec ), 6, '0', STR_PAD_LEFT);
+			$bin = str_pad(decbin($dec), 6, '0', STR_PAD_LEFT);
 			$rv .= $bin;
 			//echo "$_1 $dec ($bin)<br/>";
 		}
 		return $rv.$pad;
 	}
 
-	private function mk_ais($_enc, $_part=1,$_total=1,$_seq='',$_ch='A') {
+	private function mk_ais($_enc, $_part = 1, $_total = 1, $_seq = '', $_ch = 'A') {
 		$len_bit = strlen($_enc);
-		$rem6 = $len_bit % 6;
+		$rem6 = $len_bit%6;
 		$pad6_len = 0;
 		if ($rem6) $pad6_len = 6 - $rem6;
 		//echo  $pad6_len.'<br>';
 		$_enc .= str_repeat("0", $pad6_len); // pad the text...
-		$len_enc = strlen($_enc) / 6;
+		$len_enc = strlen($_enc)/6;
 		//echo $_enc.' '.$len_enc.'<br/>';
 		$itu = '';
-		for ($i=0; $i<$len_enc; $i++) {
-			$offset = $i * 6;
-			$dec = bindec(substr($_enc,$offset,6));
+		for ($i = 0; $i < $len_enc; $i++) {
+			$offset = $i*6;
+			$dec = bindec(substr($_enc, $offset, 6));
 			if ($dec < 40) $dec += 48;
 			else $dec += 56;
 			//echo chr($dec)." $dec<br/>";
@@ -562,15 +562,15 @@ 
 		$chksum = 0;
 		$itu = "AIVDM,$_part,$_total,$_seq,$_ch,".$itu.",0";
 		$len_itu = strlen($itu);
-		for ($i=0; $i<$len_itu; $i++) {
-			$chksum ^= ord( $itu[$i] );
+		for ($i = 0; $i < $len_itu; $i++) {
+			$chksum ^= ord($itu[$i]);
 		}
-		$hex_arr = array('0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F');
-		$lsb = $chksum & 0x0F;
-		if ($lsb >=0 && $lsb <= 15 ) $lsbc = $hex_arr[$lsb];
+		$hex_arr = array('0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F');
+		$lsb = $chksum&0x0F;
+		if ($lsb >= 0 && $lsb <= 15) $lsbc = $hex_arr[$lsb];
 		else $lsbc = '0';
-		$msb = (($chksum & 0xF0) >> 4) & 0x0F;
-		if ($msb >=0 && $msb <= 15 ) $msbc = $hex_arr[$msb];
+		$msb = (($chksum&0xF0) >> 4)&0x0F;
+		if ($msb >= 0 && $msb <= 15) $msbc = $hex_arr[$msb];
 		else $msbc = '0';
 		$itu = '!'.$itu."*{$msbc}{$lsbc}\r\n";
 		return $itu;
@@ -595,14 +595,14 @@ 
 
 	public function mmsitype($mmsi) {
 		if (strlen($mmsi) == 9) {
-			if (substr($mmsi,0,3) == '974') return 'EPIRB (Emergency Position Indicating Radio Beacon) AIS';
-			elseif (substr($mmsi,0,3) == '972') return 'MOB (Man Overboard) device';
-			elseif (substr($mmsi,0,3) == '970') return 'AIS SART (Search and Rescue Transmitter)';
-			elseif (substr($mmsi,0,3) == '111') return 'SAR (Search and Rescue) aircraft';
-			elseif (substr($mmsi,0,2) == '98') return 'Auxiliary craft associated with a parent ship';
-			elseif (substr($mmsi,0,2) == '99') return 'Aids to Navigation';
-			elseif (substr($mmsi,0,2) == '00') return 'Coastal stations';
-			elseif (substr($mmsi,0,1) == '0') return 'Group of ships';
+			if (substr($mmsi, 0, 3) == '974') return 'EPIRB (Emergency Position Indicating Radio Beacon) AIS';
+			elseif (substr($mmsi, 0, 3) == '972') return 'MOB (Man Overboard) device';
+			elseif (substr($mmsi, 0, 3) == '970') return 'AIS SART (Search and Rescue Transmitter)';
+			elseif (substr($mmsi, 0, 3) == '111') return 'SAR (Search and Rescue) aircraft';
+			elseif (substr($mmsi, 0, 2) == '98') return 'Auxiliary craft associated with a parent ship';
+			elseif (substr($mmsi, 0, 2) == '99') return 'Aids to Navigation';
+			elseif (substr($mmsi, 0, 2) == '00') return 'Coastal stations';
+			elseif (substr($mmsi, 0, 1) == '0') return 'Group of ships';
 			else return 'Ship';
 		}
 
@@ -613,19 +613,19 @@ 
 		global $globalDebug;
 		$result = array();
 		$data = new stdClass();
-		$start = strpos($buffer,"VDM");
+		$start = strpos($buffer, "VDM");
 		$tst = substr($buffer, $start - 3);
-		$data = $this->process_ais_raw( $tst, "" );
+		$data = $this->process_ais_raw($tst, "");
 		if (!is_object($data)) {
 			//if ($globalDebug) echo '==== Line format not supported : '.$buffer."\n";
 			return array();
 		}
 		if ($data->lon != 0) $result['longitude'] = $data->lon;
 		if ($data->lat != 0) $result['latitude'] = $data->lat;
-		$result['ident'] = trim(str_replace('@','',$data->name));
+		$result['ident'] = trim(str_replace('@', '', $data->name));
 		$result['timestamp'] = $data->ts;
 		$result['mmsi'] = $data->mmsi;
-		if (strlen($result['mmsi']) == 8 && substr($result['mmsi'],0,3) == '669') $result['mmsi'] = '3'.$result['mmsi'];
+		if (strlen($result['mmsi']) == 8 && substr($result['mmsi'], 0, 3) == '669') $result['mmsi'] = '3'.$result['mmsi'];
 		$result['mmsi_type'] = $this->mmsitype($result['mmsi']);
 		if ($data->sog != -1.0) $result['speed'] = $data->sog;
 		if ($data->heading !== '') $result['heading'] = $data->heading;
@@ -635,16 +635,16 @@ 
 		if ($data->type !== '') $result['type'] = $data->type;
 		if ($data->typeid !== '') $result['typeid'] = $data->typeid;
 		if ($data->imo !== '') $result['imo'] = $data->imo;
-		if ($data->callsign !== '') $result['callsign'] = trim(str_replace('@','',$data->callsign));
+		if ($data->callsign !== '') $result['callsign'] = trim(str_replace('@', '', $data->callsign));
 		if (is_numeric($data->eta_month) && $data->eta_month != 0 && is_numeric($data->eta_day) && $data->eta_day != 0 && $data->eta_hour !== '' && $data->eta_minute !== '') {
-			$eta_ts = strtotime(date('Y').'-'.sprintf("%02d",$data->eta_month).'-'.sprintf("%02d",$data->eta_day).' '.sprintf("%02d",$data->eta_hour).':'.sprintf("%02d",$data->eta_minute).':00');
+			$eta_ts = strtotime(date('Y').'-'.sprintf("%02d", $data->eta_month).'-'.sprintf("%02d", $data->eta_day).' '.sprintf("%02d", $data->eta_hour).':'.sprintf("%02d", $data->eta_minute).':00');
 			if ($eta_ts != '') $result['eta_ts'] = $eta_ts;
 		} elseif (is_numeric($data->eta_hour) && is_numeric($data->eta_minute)) {
-			$eta_ts = strtotime(date('Y-m-d').' '.sprintf("%02d",$data->eta_hour).':'.sprintf("%02d",$data->eta_minute).':00');
+			$eta_ts = strtotime(date('Y-m-d').' '.sprintf("%02d", $data->eta_hour).':'.sprintf("%02d", $data->eta_minute).':00');
 			if ($eta_ts != '') $result['eta_ts'] = $eta_ts;
 		}
 		if ($data->destination != '') {
-			$dest = trim(str_replace('@','',$data->destination));
+			$dest = trim(str_replace('@', '', $data->destination));
 			if ($dest != '') $result['destination'] = $dest;
 		}
 		$result['all'] = (array) $data;

Braces +331 added lines, -143 removed lines

@@ -35,7 +35,9 @@ 
 			$temp += 1;
 			$flat = (float)($temp / (60.0 * 10000.0));
 			$flat *= -1.0;
-		} else $flat = (float)($temp / (60.0 * 10000.0));
+		} else {
+			$flat = (float)($temp / (60.0 * 10000.0));
+		}
 		return $flat; // float
 	}
 
@@ -47,7 +49,9 @@ 
 			$temp += 1;
 			$flon = (float)($temp / (60.0 * 10000.0));
 			$flon *= -1.0;
-		} else $flon = (float)($temp / (60.0 * 10000.0));
+		} else {
+			$flon = (float)($temp / (60.0 * 10000.0));
+		}
 		return $flon;
 	}
 
@@ -70,10 +74,8 @@ 
     */
 	private function asciidec_2_8bit($ascii) {
 		//only process in the following range: 48-87, 96-119
-		if ($ascii < 48) { }
-		else {
-			if($ascii>119) { }
-			else {
+		if ($ascii < 48) { } else {
+			if($ascii>119) { } else {
 				if ($ascii>87 && $ascii<96) ;
 				else {
 					$ascii=$ascii+40;
@@ -175,7 +177,9 @@ 
 			$ro->lon = $this->make_lonf(bindec(substr($_aisdata,57,28)));
 			$ro->lat = $this->make_latf(bindec(substr($_aisdata,85,27)));
 			$ro->heading = bindec(substr($_aisdata,124,9));
-			if ($ro->heading == 511) $ro->heading = '';
+			if ($ro->heading == 511) {
+				$ro->heading = '';
+			}
 			$ro->cls = 2; // class B
 		} else if ($ro->id == 19) {
 			$ro->cog = bindec(substr($_aisdata,112,12))/10;
@@ -185,7 +189,9 @@ 
 			$ro->name = $this->binchar($_aisdata,143,120);
 			$ro->cls = 2; // class B
 			$ro->heading = bindec(substr($_aisdata,124,9));
-			if ($ro->heading == 511) $ro->heading = '';
+			if ($ro->heading == 511) {
+				$ro->heading = '';
+			}
 			$ro->typeid = bindec(substr($_aisdata,263,8));
 			$ro->type = $this->getShipType($ro->typeid);
 			//$ro->to_bow = bindec(substr($_aisdata,271,9));
@@ -216,9 +222,13 @@ 
 			$ro->cls = 2; // class B
 		} else if ($ro->id == 27) {
 			$ro->cog = bindec(substr($_aisdata,85,9));
-			if ($ro->cog == 511) $ro->cog = 0.0;
+			if ($ro->cog == 511) {
+				$ro->cog = 0.0;
+			}
 			$ro->sog = bindec(substr($_aisdata,79,6));
-			if ($ro->sog == 63) $ro->sog = 0.0;
+			if ($ro->sog == 63) {
+				$ro->sog = 0.0;
+			}
 			$ro->lon = $this->make_lonf(bindec(substr($_aisdata,44,18))*10);
 			$ro->lat = $this->make_latf(bindec(substr($_aisdata,62,17))*10);
 			$ro->cls = 1; // class A
@@ -267,88 +277,171 @@ 
 	}
 	
 	public function getShipType($code) {
-		if ($code == 0) return 'Not available (default)';
-		elseif ($code >= 1 && $code <= 19) return 'Reserved for future use';
-		elseif ($code == 20) return 'Wing in ground (WIG), all ships of this type';
-		elseif ($code == 21) return 'Wing in ground (WIG), Hazardous category A';
-		elseif ($code == 22) return 'Wing in ground (WIG), Hazardous category B';
-		elseif ($code == 23) return 'Wing in ground (WIG), Hazardous category C';
-		elseif ($code == 24) return 'Wing in ground (WIG), Hazardous category D';
-		elseif ($code == 25) return 'Wing in ground (WIG), Reserved for future use';
-		elseif ($code == 26) return 'Wing in ground (WIG), Reserved for future use';
-		elseif ($code == 27) return 'Wing in ground (WIG), Reserved for future use';
-		elseif ($code == 28) return 'Wing in ground (WIG), Reserved for future use';
-		elseif ($code == 29) return 'Wing in ground (WIG), Reserved for future use';
-		elseif ($code == 30) return 'Fishing';
-		elseif ($code == 31) return 'Towing';
-		elseif ($code == 32) return 'Towing: length exceeds 200m or breadth exceeds 25m';
-		elseif ($code == 33) return 'Dredging or underwater ops';
-		elseif ($code == 34) return 'Diving ops';
-		elseif ($code == 35) return 'Military ops';
-		elseif ($code == 36) return 'Sailing';
-		elseif ($code == 37) return 'Pleasure Craft';
-		elseif ($code == 38) return 'Reserved';
-		elseif ($code == 39) return 'Reserved';
-		elseif ($code == 40) return 'High speed craft (HSC), all ships of this type';
-		elseif ($code == 41) return 'High speed craft (HSC), Hazardous category A';
-		elseif ($code == 42) return 'High speed craft (HSC), Hazardous category B';
-		elseif ($code == 43) return 'High speed craft (HSC), Hazardous category C';
-		elseif ($code == 44) return 'High speed craft (HSC), Hazardous category D';
-		elseif ($code == 45) return 'High speed craft (HSC), Reserved for future use';
-		elseif ($code == 46) return 'High speed craft (HSC), Reserved for future use';
-		elseif ($code == 47) return 'High speed craft (HSC), Reserved for future use';
-		elseif ($code == 48) return 'High speed craft (HSC), Reserved for future use';
-		elseif ($code == 49) return 'High speed craft (HSC), No additional information';
-		elseif ($code == 50) return 'Pilot Vessel';
-		elseif ($code == 51) return 'Search and Rescue vessel';
-		elseif ($code == 52) return 'Tug';
-		elseif ($code == 53) return 'Port Tender';
-		elseif ($code == 54) return 'Anti-pollution equipment';
-		elseif ($code == 55) return 'Law Enforcement';
-		elseif ($code == 56) return 'Spare - Local Vessel';
-		elseif ($code == 57) return 'Spare - Local Vessel';
-		elseif ($code == 58) return 'Medical Transport';
-		elseif ($code == 59) return 'Noncombatant ship according to RR Resolution No. 18';
-		elseif ($code == 60) return 'Passenger, all ships of this type';
-		elseif ($code == 61) return 'Passenger, Hazardous category A';
-		elseif ($code == 62) return 'Passenger, Hazardous category B';
-		elseif ($code == 63) return 'Passenger, Hazardous category C';
-		elseif ($code == 64) return 'Passenger, Hazardous category D';
-		elseif ($code == 65) return 'Passenger, Reserved for future use';
-		elseif ($code == 66) return 'Passenger, Reserved for future use';
-		elseif ($code == 67) return 'Passenger, Reserved for future use';
-		elseif ($code == 68) return 'Passenger, Reserved for future use';
-		elseif ($code == 69) return 'Passenger, No additional information';
-		elseif ($code == 70) return 'Cargo, all ships of this type';
-		elseif ($code == 71) return 'Cargo, Hazardous category A';
-		elseif ($code == 72) return 'Cargo, Hazardous category B';
-		elseif ($code == 73) return 'Cargo, Hazardous category C';
-		elseif ($code == 74) return 'Cargo, Hazardous category D';
-		elseif ($code == 75) return 'Cargo, Reserved for future use';
-		elseif ($code == 76) return 'Cargo, Reserved for future use';
-		elseif ($code == 77) return 'Cargo, Reserved for future use';
-		elseif ($code == 78) return 'Cargo, Reserved for future use';
-		elseif ($code == 79) return 'Cargo, No additional information';
-		elseif ($code == 80) return 'Tanker, all ships of this type';
-		elseif ($code == 81) return 'Tanker, Hazardous category A';
-		elseif ($code == 82) return 'Tanker, Hazardous category B';
-		elseif ($code == 83) return 'Tanker, Hazardous category C';
-		elseif ($code == 84) return 'Tanker, Hazardous category D';
-		elseif ($code == 85) return 'Tanker, Reserved for future use';
-		elseif ($code == 86) return 'Tanker, Reserved for future use';
-		elseif ($code == 87) return 'Tanker, Reserved for future use';
-		elseif ($code == 88) return 'Tanker, Reserved for future use';
-		elseif ($code == 89) return 'Tanker, No additional information';
-		elseif ($code == 90) return 'Other Type, all ships of this type';
-		elseif ($code == 91) return 'Other Type, Hazardous category A';
-		elseif ($code == 92) return 'Other Type, Hazardous category B';
-		elseif ($code == 93) return 'Other Type, Hazardous category C';
-		elseif ($code == 94) return 'Other Type, Hazardous category D';
-		elseif ($code == 95) return 'Other Type, Reserved for future use';
-		elseif ($code == 96) return 'Other Type, Reserved for future use';
-		elseif ($code == 97) return 'Other Type, Reserved for future use';
-		elseif ($code == 98) return 'Other Type, Reserved for future use';
-		elseif ($code == 99) return 'Other Type, no additional information';
+		if ($code == 0) {
+			return 'Not available (default)';
+		} elseif ($code >= 1 && $code <= 19) {
+			return 'Reserved for future use';
+		} elseif ($code == 20) {
+			return 'Wing in ground (WIG), all ships of this type';
+		} elseif ($code == 21) {
+			return 'Wing in ground (WIG), Hazardous category A';
+		} elseif ($code == 22) {
+			return 'Wing in ground (WIG), Hazardous category B';
+		} elseif ($code == 23) {
+			return 'Wing in ground (WIG), Hazardous category C';
+		} elseif ($code == 24) {
+			return 'Wing in ground (WIG), Hazardous category D';
+		} elseif ($code == 25) {
+			return 'Wing in ground (WIG), Reserved for future use';
+		} elseif ($code == 26) {
+			return 'Wing in ground (WIG), Reserved for future use';
+		} elseif ($code == 27) {
+			return 'Wing in ground (WIG), Reserved for future use';
+		} elseif ($code == 28) {
+			return 'Wing in ground (WIG), Reserved for future use';
+		} elseif ($code == 29) {
+			return 'Wing in ground (WIG), Reserved for future use';
+		} elseif ($code == 30) {
+			return 'Fishing';
+		} elseif ($code == 31) {
+			return 'Towing';
+		} elseif ($code == 32) {
+			return 'Towing: length exceeds 200m or breadth exceeds 25m';
+		} elseif ($code == 33) {
+			return 'Dredging or underwater ops';
+		} elseif ($code == 34) {
+			return 'Diving ops';
+		} elseif ($code == 35) {
+			return 'Military ops';
+		} elseif ($code == 36) {
+			return 'Sailing';
+		} elseif ($code == 37) {
+			return 'Pleasure Craft';
+		} elseif ($code == 38) {
+			return 'Reserved';
+		} elseif ($code == 39) {
+			return 'Reserved';
+		} elseif ($code == 40) {
+			return 'High speed craft (HSC), all ships of this type';
+		} elseif ($code == 41) {
+			return 'High speed craft (HSC), Hazardous category A';
+		} elseif ($code == 42) {
+			return 'High speed craft (HSC), Hazardous category B';
+		} elseif ($code == 43) {
+			return 'High speed craft (HSC), Hazardous category C';
+		} elseif ($code == 44) {
+			return 'High speed craft (HSC), Hazardous category D';
+		} elseif ($code == 45) {
+			return 'High speed craft (HSC), Reserved for future use';
+		} elseif ($code == 46) {
+			return 'High speed craft (HSC), Reserved for future use';
+		} elseif ($code == 47) {
+			return 'High speed craft (HSC), Reserved for future use';
+		} elseif ($code == 48) {
+			return 'High speed craft (HSC), Reserved for future use';
+		} elseif ($code == 49) {
+			return 'High speed craft (HSC), No additional information';
+		} elseif ($code == 50) {
+			return 'Pilot Vessel';
+		} elseif ($code == 51) {
+			return 'Search and Rescue vessel';
+		} elseif ($code == 52) {
+			return 'Tug';
+		} elseif ($code == 53) {
+			return 'Port Tender';
+		} elseif ($code == 54) {
+			return 'Anti-pollution equipment';
+		} elseif ($code == 55) {
+			return 'Law Enforcement';
+		} elseif ($code == 56) {
+			return 'Spare - Local Vessel';
+		} elseif ($code == 57) {
+			return 'Spare - Local Vessel';
+		} elseif ($code == 58) {
+			return 'Medical Transport';
+		} elseif ($code == 59) {
+			return 'Noncombatant ship according to RR Resolution No. 18';
+		} elseif ($code == 60) {
+			return 'Passenger, all ships of this type';
+		} elseif ($code == 61) {
+			return 'Passenger, Hazardous category A';
+		} elseif ($code == 62) {
+			return 'Passenger, Hazardous category B';
+		} elseif ($code == 63) {
+			return 'Passenger, Hazardous category C';
+		} elseif ($code == 64) {
+			return 'Passenger, Hazardous category D';
+		} elseif ($code == 65) {
+			return 'Passenger, Reserved for future use';
+		} elseif ($code == 66) {
+			return 'Passenger, Reserved for future use';
+		} elseif ($code == 67) {
+			return 'Passenger, Reserved for future use';
+		} elseif ($code == 68) {
+			return 'Passenger, Reserved for future use';
+		} elseif ($code == 69) {
+			return 'Passenger, No additional information';
+		} elseif ($code == 70) {
+			return 'Cargo, all ships of this type';
+		} elseif ($code == 71) {
+			return 'Cargo, Hazardous category A';
+		} elseif ($code == 72) {
+			return 'Cargo, Hazardous category B';
+		} elseif ($code == 73) {
+			return 'Cargo, Hazardous category C';
+		} elseif ($code == 74) {
+			return 'Cargo, Hazardous category D';
+		} elseif ($code == 75) {
+			return 'Cargo, Reserved for future use';
+		} elseif ($code == 76) {
+			return 'Cargo, Reserved for future use';
+		} elseif ($code == 77) {
+			return 'Cargo, Reserved for future use';
+		} elseif ($code == 78) {
+			return 'Cargo, Reserved for future use';
+		} elseif ($code == 79) {
+			return 'Cargo, No additional information';
+		} elseif ($code == 80) {
+			return 'Tanker, all ships of this type';
+		} elseif ($code == 81) {
+			return 'Tanker, Hazardous category A';
+		} elseif ($code == 82) {
+			return 'Tanker, Hazardous category B';
+		} elseif ($code == 83) {
+			return 'Tanker, Hazardous category C';
+		} elseif ($code == 84) {
+			return 'Tanker, Hazardous category D';
+		} elseif ($code == 85) {
+			return 'Tanker, Reserved for future use';
+		} elseif ($code == 86) {
+			return 'Tanker, Reserved for future use';
+		} elseif ($code == 87) {
+			return 'Tanker, Reserved for future use';
+		} elseif ($code == 88) {
+			return 'Tanker, Reserved for future use';
+		} elseif ($code == 89) {
+			return 'Tanker, No additional information';
+		} elseif ($code == 90) {
+			return 'Other Type, all ships of this type';
+		} elseif ($code == 91) {
+			return 'Other Type, Hazardous category A';
+		} elseif ($code == 92) {
+			return 'Other Type, Hazardous category B';
+		} elseif ($code == 93) {
+			return 'Other Type, Hazardous category C';
+		} elseif ($code == 94) {
+			return 'Other Type, Hazardous category D';
+		} elseif ($code == 95) {
+			return 'Other Type, Reserved for future use';
+		} elseif ($code == 96) {
+			return 'Other Type, Reserved for future use';
+		} elseif ($code == 97) {
+			return 'Other Type, Reserved for future use';
+		} elseif ($code == 98) {
+			return 'Other Type, Reserved for future use';
+		} elseif ($code == 99) {
+			return 'Other Type, no additional information';
+		}
 	}
 
 	public function process_ais_itu($_itu, $_len, $_filler, $aux /*, $ais_ch*/) {
@@ -386,11 +479,20 @@ 
 		// assume 1st ! is valid
 		// find * ensure that it is at correct position
 		$end = strrpos ( $rawdata , '*' );
-		if ($end === FALSE) return -1; // check for NULLS!!!
+		if ($end === FALSE) {
+			return -1;
+		}
+		// check for NULLS!!!
 		$cs = substr( $rawdata, $end + 1 );
-		if ( strlen($cs) != 2 ) return -1; // correct cs length
+		if ( strlen($cs) != 2 ) {
+			return -1;
+		}
+		// correct cs length
 		$dcs = (int)hexdec( $cs );
-		for ( $alias=1; $alias<$end; $alias++) $chksum ^= ord( $rawdata[$alias] ); // perform XOR for NMEA checksum
+		for ( $alias=1; $alias<$end; $alias++) {
+			$chksum ^= ord( $rawdata[$alias] );
+		}
+		// perform XOR for NMEA checksum
 		if ( $chksum == $dcs ) { // NMEA checksum pass
 			$pcs = explode(',', $rawdata);
 			// !AI??? identifier
@@ -401,8 +503,14 @@ 
 			$num_seq = (int)$pcs[1]; // number of sequences
 			$seq = (int)$pcs[2]; // get sequence
 			// get msg sequence id
-			if ($pcs[3] == '') $msg_sid = -1; // non-multipart message, set to -1
-			else $msg_sid = (int)$pcs[3]; // multipart message
+			if ($pcs[3] == '') {
+				$msg_sid = -1;
+			}
+			// non-multipart message, set to -1
+			else {
+				$msg_sid = (int)$pcs[3];
+			}
+			// multipart message
 			$ais_ch = $pcs[4]; // get AIS channel
 			// message sequence checking
 			if ($num_seq < 1 || $num_seq > 9) {
@@ -463,10 +571,18 @@ 
 				//DEBUG echo "[$start $end $tst]\n";
 				$result = $this->process_ais_raw( $tst, "" );
 				$last_pos = $end + 1;
-			} else break;
+			} else {
+				break;
+			}
 		}
-		if ($last_pos > 0) $cbuf = substr($cbuf, $last_pos); // move...
-		if (strlen($cbuf) > 1024) $cbuf = ""; // prevent overflow simple mode...
+		if ($last_pos > 0) {
+			$cbuf = substr($cbuf, $last_pos);
+		}
+		// move...
+		if (strlen($cbuf) > 1024) {
+			$cbuf = "";
+		}
+		// prevent overflow simple mode...
 		return $result;
 	}
 
@@ -486,7 +602,9 @@ 
 		if ($lat<0.0) {
 			$lat = -$lat;
 			$neg=true;
-		} else $neg=false;
+		} else {
+			$neg=false;
+		}
 		$latd = 0x00000000;
 		$latd = intval ($lat * 600000.0);
 		if ($neg==true) {
@@ -502,7 +620,9 @@ 
 		if ($lon<0.0) {
 			$lon = -$lon;
 			$neg=true;
-		} else $neg=false;
+		} else {
+			$neg=false;
+		}
 		$lond = 0x00000000;
 		$lond = intval ($lon * 600000.0);
 		if ($neg==true) {
@@ -515,9 +635,14 @@ 
 
 	private function char2bin($name, $max_len) {
 		$len = strlen($name);
-		if ($len > $max_len) $name = substr($name,0,$max_len);
-		if ($len < $max_len) $pad = str_repeat('0', ($max_len - $len) * 6);
-		else $pad = '';
+		if ($len > $max_len) {
+			$name = substr($name,0,$max_len);
+		}
+		if ($len < $max_len) {
+			$pad = str_repeat('0', ($max_len - $len) * 6);
+		} else {
+			$pad = '';
+		}
 		$rv = '';
 		$ais_chars = array(
 		    '@'=>0, 'A'=>1, 'B'=>2, 'C'=>3, 'D'=>4, 'E'=>5, 'F'=>6, 'G'=>7, 'H'=>8, 'I'=>9,
@@ -530,9 +655,12 @@ 
 		);
 		// "
 		$_a = str_split($name);
-		if ($_a) foreach ($_a as $_1) {
+		if ($_a) {
+			foreach ($_a as $_1) {
 			if (isset($ais_chars[$_1])) $dec = $ais_chars[$_1];
-			else $dec = 0;
+		} else {
+				$dec = 0;
+			}
 			$bin = str_pad(decbin( $dec ), 6, '0', STR_PAD_LEFT);
 			$rv .= $bin;
 			//echo "$_1 $dec ($bin)<br/>";
@@ -544,7 +672,9 @@ 
 		$len_bit = strlen($_enc);
 		$rem6 = $len_bit % 6;
 		$pad6_len = 0;
-		if ($rem6) $pad6_len = 6 - $rem6;
+		if ($rem6) {
+			$pad6_len = 6 - $rem6;
+		}
 		//echo  $pad6_len.'<br>';
 		$_enc .= str_repeat("0", $pad6_len); // pad the text...
 		$len_enc = strlen($_enc) / 6;
@@ -553,8 +683,11 @@ 
 		for ($i=0; $i<$len_enc; $i++) {
 			$offset = $i * 6;
 			$dec = bindec(substr($_enc,$offset,6));
-			if ($dec < 40) $dec += 48;
-			else $dec += 56;
+			if ($dec < 40) {
+				$dec += 48;
+			} else {
+				$dec += 56;
+			}
 			//echo chr($dec)." $dec<br/>";
 			$itu .= chr($dec);
 		}
@@ -567,25 +700,41 @@ 
 		}
 		$hex_arr = array('0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F');
 		$lsb = $chksum & 0x0F;
-		if ($lsb >=0 && $lsb <= 15 ) $lsbc = $hex_arr[$lsb];
-		else $lsbc = '0';
+		if ($lsb >=0 && $lsb <= 15 ) {
+			$lsbc = $hex_arr[$lsb];
+		} else {
+			$lsbc = '0';
+		}
 		$msb = (($chksum & 0xF0) >> 4) & 0x0F;
-		if ($msb >=0 && $msb <= 15 ) $msbc = $hex_arr[$msb];
-		else $msbc = '0';
+		if ($msb >=0 && $msb <= 15 ) {
+			$msbc = $hex_arr[$msb];
+		} else {
+			$msbc = '0';
+		}
 		$itu = '!'.$itu."*{$msbc}{$lsbc}\r\n";
 		return $itu;
 	}
 
 	public function parse($buffer) {
 		$data = $this->process_ais_buf($buffer);
-		if (!is_object($data)) return array();
-		if ($data->lon != 0) $result['longitude'] = $data->lon;
-		if ($data->lat != 0) $result['latitude'] = $data->lat;
+		if (!is_object($data)) {
+			return array();
+		}
+		if ($data->lon != 0) {
+			$result['longitude'] = $data->lon;
+		}
+		if ($data->lat != 0) {
+			$result['latitude'] = $data->lat;
+		}
 		$result['ident'] = trim($data->name);
 		$result['timestamp'] = $data->ts;
 		$result['mmsi'] = $data->mmsi;
-		if ($data->sog != -1.0) $result['speed'] = $data->sog;
-		if ($data->cog != 0) $result['heading'] = $data->cog;
+		if ($data->sog != -1.0) {
+			$result['speed'] = $data->sog;
+		}
+		if ($data->cog != 0) {
+			$result['heading'] = $data->cog;
+		}
 		/*
 		    $ro->cls = 0; // AIS class undefined, also indicate unparsed msg
 		    $ro->id = bindec(substr($_aisdata,0,6));
@@ -595,15 +744,25 @@ 
 
 	public function mmsitype($mmsi) {
 		if (strlen($mmsi) == 9) {
-			if (substr($mmsi,0,3) == '974') return 'EPIRB (Emergency Position Indicating Radio Beacon) AIS';
-			elseif (substr($mmsi,0,3) == '972') return 'MOB (Man Overboard) device';
-			elseif (substr($mmsi,0,3) == '970') return 'AIS SART (Search and Rescue Transmitter)';
-			elseif (substr($mmsi,0,3) == '111') return 'SAR (Search and Rescue) aircraft';
-			elseif (substr($mmsi,0,2) == '98') return 'Auxiliary craft associated with a parent ship';
-			elseif (substr($mmsi,0,2) == '99') return 'Aids to Navigation';
-			elseif (substr($mmsi,0,2) == '00') return 'Coastal stations';
-			elseif (substr($mmsi,0,1) == '0') return 'Group of ships';
-			else return 'Ship';
+			if (substr($mmsi,0,3) == '974') {
+				return 'EPIRB (Emergency Position Indicating Radio Beacon) AIS';
+			} elseif (substr($mmsi,0,3) == '972') {
+				return 'MOB (Man Overboard) device';
+			} elseif (substr($mmsi,0,3) == '970') {
+				return 'AIS SART (Search and Rescue Transmitter)';
+			} elseif (substr($mmsi,0,3) == '111') {
+				return 'SAR (Search and Rescue) aircraft';
+			} elseif (substr($mmsi,0,2) == '98') {
+				return 'Auxiliary craft associated with a parent ship';
+			} elseif (substr($mmsi,0,2) == '99') {
+				return 'Aids to Navigation';
+			} elseif (substr($mmsi,0,2) == '00') {
+				return 'Coastal stations';
+			} elseif (substr($mmsi,0,1) == '0') {
+				return 'Group of ships';
+			} else {
+				return 'Ship';
+			}
 		}
 
 	
@@ -620,32 +779,61 @@ 
 			//if ($globalDebug) echo '==== Line format not supported : '.$buffer."\n";
 			return array();
 		}
-		if ($data->lon != 0) $result['longitude'] = $data->lon;
-		if ($data->lat != 0) $result['latitude'] = $data->lat;
+		if ($data->lon != 0) {
+			$result['longitude'] = $data->lon;
+		}
+		if ($data->lat != 0) {
+			$result['latitude'] = $data->lat;
+		}
 		$result['ident'] = trim(str_replace('@','',$data->name));
 		$result['timestamp'] = $data->ts;
 		$result['mmsi'] = $data->mmsi;
-		if (strlen($result['mmsi']) == 8 && substr($result['mmsi'],0,3) == '669') $result['mmsi'] = '3'.$result['mmsi'];
+		if (strlen($result['mmsi']) == 8 && substr($result['mmsi'],0,3) == '669') {
+			$result['mmsi'] = '3'.$result['mmsi'];
+		}
 		$result['mmsi_type'] = $this->mmsitype($result['mmsi']);
-		if ($data->sog != -1.0) $result['speed'] = $data->sog;
-		if ($data->heading !== '') $result['heading'] = $data->heading;
-		elseif ($data->cog != 0) $result['heading'] = $data->cog;
-		if ($data->status != '') $result['status'] = $data->status;
-		if ($data->statusid !== '') $result['statusid'] = $data->statusid;
-		if ($data->type !== '') $result['type'] = $data->type;
-		if ($data->typeid !== '') $result['typeid'] = $data->typeid;
-		if ($data->imo !== '') $result['imo'] = $data->imo;
-		if ($data->callsign !== '') $result['callsign'] = trim(str_replace('@','',$data->callsign));
+		if ($data->sog != -1.0) {
+			$result['speed'] = $data->sog;
+		}
+		if ($data->heading !== '') {
+			$result['heading'] = $data->heading;
+		} elseif ($data->cog != 0) {
+			$result['heading'] = $data->cog;
+		}
+		if ($data->status != '') {
+			$result['status'] = $data->status;
+		}
+		if ($data->statusid !== '') {
+			$result['statusid'] = $data->statusid;
+		}
+		if ($data->type !== '') {
+			$result['type'] = $data->type;
+		}
+		if ($data->typeid !== '') {
+			$result['typeid'] = $data->typeid;
+		}
+		if ($data->imo !== '') {
+			$result['imo'] = $data->imo;
+		}
+		if ($data->callsign !== '') {
+			$result['callsign'] = trim(str_replace('@','',$data->callsign));
+		}
 		if (is_numeric($data->eta_month) && $data->eta_month != 0 && is_numeric($data->eta_day) && $data->eta_day != 0 && $data->eta_hour !== '' && $data->eta_minute !== '') {
 			$eta_ts = strtotime(date('Y').'-'.sprintf("%02d",$data->eta_month).'-'.sprintf("%02d",$data->eta_day).' '.sprintf("%02d",$data->eta_hour).':'.sprintf("%02d",$data->eta_minute).':00');
-			if ($eta_ts != '') $result['eta_ts'] = $eta_ts;
+			if ($eta_ts != '') {
+				$result['eta_ts'] = $eta_ts;
+			}
 		} elseif (is_numeric($data->eta_hour) && is_numeric($data->eta_minute)) {
 			$eta_ts = strtotime(date('Y-m-d').' '.sprintf("%02d",$data->eta_hour).':'.sprintf("%02d",$data->eta_minute).':00');
-			if ($eta_ts != '') $result['eta_ts'] = $eta_ts;
+			if ($eta_ts != '') {
+				$result['eta_ts'] = $eta_ts;
+			}
 		}
 		if ($data->destination != '') {
 			$dest = trim(str_replace('@','',$data->destination));
-			if ($dest != '') $result['destination'] = $dest;
+			if ($dest != '') {
+				$result['destination'] = $dest;
+			}
 		}
 		$result['all'] = (array) $data;
 		/*