$re = '/(?<=<title\>)(.*?)(?=(,|\s*<\/title>))/m';
$str = '<title>Kincrome K1500G - Tool Workshop Contour 472 Piece 15 Drawer 1/4", 3/8" & 1/2" Drive Monster Green</title>
';
preg_match_all($re, $str, $matches, PREG_SET_ORDER, 0);
// Print the entire match result
var_dump($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