$re = '/^(?=.*\d)(?=.*[^\w\s]).{8,}$/m';
$str = 'Valid passwords:
xkM65!asd
a8jjxa39!af
!r3g3x101!
Tr0ub4dor&3
Invalid passwords:
correcthorsebatterystaple
password
jh81?
starwarsrulez1';
preg_match_all($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