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<?php |
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namespace Recca0120\LaravelTracy\Panels; |
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use PDO; |
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use DateTime; |
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class Helper |
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{ |
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/** |
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* KEYWORDS1. |
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* |
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* @var string |
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*/ |
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const KEYWORDS1 = 'SELECT|(?:ON\s+DUPLICATE\s+KEY)?UPDATE|INSERT(?:\s+INTO)?|REPLACE(?:\s+INTO)?|DELETE|CALL|UNION|FROM|WHERE|HAVING|GROUP\s+BY|ORDER\s+BY|LIMIT|OFFSET|SET|VALUES|LEFT\s+JOIN|INNER\s+JOIN|TRUNCATE'; |
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/** |
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* KEYWORDS2. |
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* |
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* @var string |
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*/ |
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const KEYWORDS2 = 'ALL|DISTINCT|DISTINCTROW|IGNORE|AS|USING|ON|AND|OR|IN|IS|NOT|NULL|[RI]?LIKE|REGEXP|TRUE|FALSE'; |
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/** |
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* Returns syntax highlighted SQL command. |
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* |
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* |
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* @param string $sql |
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* @param array $bindings |
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* @param \PDO $pdo |
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* @return string |
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*/ |
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public static function hightlight($sql, array $bindings = [], PDO $pdo = null) |
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{ |
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// insert new lines |
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$sql = " $sql "; |
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$sql = preg_replace('#(?<=[\\s,(])('.static::KEYWORDS1.')(?=[\\s,)])#i', "\n\$1", $sql); |
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// reduce spaces |
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$sql = preg_replace('#[ \t]{2,}#', ' ', $sql); |
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// syntax highlight |
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$sql = htmlspecialchars($sql, ENT_IGNORE, 'UTF-8'); |
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$sql = preg_replace_callback('#(/\\*.+?\\*/)|(\\*\\*.+?\\*\\*)|(?<=[\\s,(])('.static::KEYWORDS1.')(?=[\\s,)])|(?<=[\\s,(=])('.static::KEYWORDS2.')(?=[\\s,)=])#is', function ($matches) { |
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if (! empty($matches[1])) { // comment |
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return '<em style="color:gray">'.$matches[1].'</em>'; |
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} elseif (! empty($matches[2])) { // error |
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return '<strong style="color:red">'.$matches[2].'</strong>'; |
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} elseif (! empty($matches[3])) { // most important keywords |
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return '<strong style="color:blue; text-transform: uppercase;">'.$matches[3].'</strong>'; |
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} elseif (! empty($matches[4])) { // other keywords |
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return '<strong style="color:green">'.$matches[4].'</strong>'; |
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} |
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}, $sql); |
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$bindings = array_map(function ($binding) use ($pdo) { |
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if (is_array($binding) === true) { |
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$binding = implode(', ', array_map(function ($value) { |
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return is_string($value) === true ? htmlspecialchars('\''.$value.'\'', ENT_NOQUOTES, 'UTF-8') : $value; |
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}, $binding)); |
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return htmlspecialchars('('.$binding.')', ENT_NOQUOTES, 'UTF-8'); |
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} |
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if (is_string($binding) === true && (preg_match('#[^\x09\x0A\x0D\x20-\x7E\xA0-\x{10FFFF}]#u', $binding) || preg_last_error())) { |
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return '<i title="Length '.strlen($binding).' bytes"><binary></i>'; |
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} |
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if (is_string($binding) === true) { |
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$text = htmlspecialchars($pdo ? $pdo->quote($binding) : '\''.$binding.'\'', ENT_NOQUOTES, 'UTF-8'); |
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return '<span title="Length '.strlen($text).' characters">'.$text.'</span>'; |
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} |
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if (is_resource($binding) === true) { |
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$type = get_resource_type($binding); |
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if ($type === 'stream') { |
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$info = stream_get_meta_data($binding); |
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} |
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return '<i'.(isset($info['uri']) ? ' title="'.htmlspecialchars($info['uri'], ENT_NOQUOTES, 'UTF-8').'"' : null) |
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.'><'.htmlspecialchars($type, ENT_NOQUOTES, 'UTF-8').' resource></i>'; |
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} |
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if ($binding instanceof DateTime) { |
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return htmlspecialchars('\''.$binding->format('Y-m-d H:i:s').'\'', ENT_NOQUOTES, 'UTF-8'); |
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} |
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return htmlspecialchars($binding, ENT_NOQUOTES, 'UTF-8'); |
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}, $bindings); |
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$sql = str_replace(['%', '?'], ['%%', '%s'], $sql); |
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return '<div><code>'.nl2br(trim(vsprintf($sql, $bindings))).'</code></div>'; |
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} |
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/** |
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* perform quer analysis hint. |
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* |
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* @param string $sql |
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* @param string $version |
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* @param float $driver |
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* @return array |
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*/ |
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public static function performQueryAnalysis($sql, $version = null, $driver = null) |
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{ |
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$hints = []; |
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if (preg_match('/^\\s*SELECT\\s*`?[a-zA-Z0-9]*`?\\.?\\*/i', $sql)) { |
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$hints[] = 'Use <code>SELECT *</code> only if you need all columns from table'; |
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} |
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if (preg_match('/ORDER BY RAND()/i', $sql)) { |
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$hints[] = '<code>ORDER BY RAND()</code> is slow, try to avoid if you can. |
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You can <a href="http://stackoverflow.com/questions/2663710/how-does-mysqls-order-by-rand-work">read this</a> |
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or <a href="http://stackoverflow.com/questions/1244555/how-can-i-optimize-mysqls-order-by-rand-function">this</a>'; |
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} |
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if (strpos($sql, '!=') !== false) { |
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$hints[] = 'The <code>!=</code> operator is not standard. Use the <code><></code> operator to test for inequality instead.'; |
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} |
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if (stripos($sql, 'WHERE') === false) { |
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$hints[] = 'The <code>SELECT</code> statement has no <code>WHERE</code> clause and could examine many more rows than intended'; |
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} |
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if (preg_match('/LIMIT\\s/i', $sql) && stripos($sql, 'ORDER BY') === false) { |
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$hints[] = '<code>LIMIT</code> without <code>ORDER BY</code> causes non-deterministic results, depending on the query execution plan'; |
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} |
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if (preg_match('/LIKE\\s[\'"](%.*?)[\'"]/i', $sql, $matches)) { |
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$hints[] = 'An argument has a leading wildcard character: <code>'.$matches[1].'</code>. |
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The predicate with this argument is not sargable and cannot use an index if one exists.'; |
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} |
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if ($version < 5.5 && $driver === 'mysql') { |
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if (preg_match('/\\sIN\\s*\\(\\s*SELECT/i', $sql)) { |
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$hints[] = '<code>IN()</code> and <code>NOT IN()</code> subqueries are poorly optimized in that MySQL version : '.$version. |
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'. MySQL executes the subquery as a dependent subquery for each row in the outer query'; |
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} |
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} |
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return $hints; |
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} |
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/** |
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* explain sql. |
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* |
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* @param PDO $pdo |
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* @param string $sql |
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* @param array $bindings |
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* @return array |
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*/ |
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public static function explain(PDO $pdo, $sql, $bindings = []) |
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{ |
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$explains = []; |
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if (preg_match('#\s*\(?\s*SELECT\s#iA', $sql)) { |
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$statement = $pdo->prepare('EXPLAIN '.$sql); |
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$statement->execute($bindings); |
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$explains = $statement->fetchAll(PDO::FETCH_CLASS); |
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} |
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return $explains; |
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} |
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} |
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recca0120 /
laravel-tracy
