- var_dump: documentation ( source)
- preg_match: documentation ( source)
<?php
$string = "abdsasdbm absdas dbasdn mda 2-01602171-63543";
$regex = "/[0-9]{1}-[0-9]{8}-[0-9]{5}/";
$result = (preg_match($regex, $string, $result)) ? $result : "";
var_dump($result);