<?php
$string= 'blah blah result.php?whatiwanttoecho';
foreach(end($matches) as $key=> $value){ print '<pre>'.print_r($value, 1).'</pre>'; }
?>
PD9waHAKCiRzdHJpbmc9ICdibGFoIGJsYWggcmVzdWx0LnBocD93aGF0aXdhbnR0b2VjaG8nOwpwcmVnX21hdGNoX2FsbCgnL3Jlc3VsdFwucGhwXD8oWy5cd1xXXSo/KVxzL3VpJywgJHN0cmluZywgJG1hdGNoZXMpOwpmb3JlYWNoKGVuZCgkbWF0Y2hlcykgYXMgJGtleT0+ICR2YWx1ZSl7CiAgICBwcmludCAnPHByZT4nLnByaW50X3IoJHZhbHVlLCAxKS4nPC9wcmU+JzsKfQoKPz4=