$re = '/(\s*([\0\b\'\"\n\r\t\%\_\\\\]*\s*(((select\s*.+\s*from\s*.+)|(insert\s*.+\s*into\s*.+)|(update\s*.+\s*set\s*.+)|(delete\s*.+\s*from\s*.+)|(drop\s*.+)|(truncate\s*.+)|(alter\s*.+)|(exec\s*.+)|(\s*(all|any|not|and|between|in|like|or|some|contains|containsall|containskey)\s*.+[\=\>\<=\!\~]+.+)|(let\s+.+[\=]\s*.*)|(begin\s*.*\s*end)|(\s*[\/\*]+\s*.*\s*[\*\/]+)|(\s*(\-\-)\s*.*\s+)|(\s*(contains|containsall|containskey)\s+.*)))(\s*[\;]\s*)*)+)/i';
$str = '';
preg_match($re, $str, $matches, PREG_OFFSET_CAPTURE, 0);
// Print the entire match result
var_dump($matches);
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for PHP, please visit: http://php.net/manual/en/ref.pcre.php