$re = '/^( *)( *)( *)([\'.-])((?!\4)(?4)+?)((?!\4|\5)(?4)++)\1\3whale
(?=.(.))\6.\7\4(?!\4|\6)([_\/])\3(?!(?11))\8\2(?=\2)\3\1_((?=\4+.).\5(?!\6)\5)(?!.?\')\7\4
(?=.\7)\6.([,`])\3{2}(?=.((?!\8)[_\/])\11)\Q(_\E.\4{2}(?!\.)\5((?!\10)(?10)(?!\4+|\5|\6))\1\3{3}(\\\\)
(\3{3})\13\2{2}\1{1}\3+(?<=\S {10})\4\1\3\|
\1(?=\12)(?12)(?!`,)\10\4(\11{2})\4\14\10\15\9\8
\14{2}(?=\6)[\'-]\4(?<!-)\11\8\11\4\6\11\15\.-|(?!)/';
$str = '';
preg_match($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