$re = '/d*/m';
$str = '1) "100100"
2) "110011"
3) "010000"
4) "110011"
5) "111111"
6) "000111"
7) "000000"
8) "423453"';
preg_match_all($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