$re = '/((ftp|http):\/\/)?(w{3})?\.([a-zA-Z0-9.-]+)\.([a-z]{2}|([a-z]{2,3}\.[a-z]{2}))/';
$str = 'ftp://www.sass32.cosssssss.msdd
http://';
preg_match_all($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