3v4l.org

run code in 300+ PHP versions simultaneously

sponsor
bughunt
search
recent
about

@ 2014-03-05T15:16:29Z

<?php
$userId = '12';
echo preg_match('/\A[0-9]+\z/', $userId) ? 'true' : 'false';

Output
Performance
VLD
References
Branches

preg_match: documentation ( source)

preferences:dark modelive preview

36.1 ms | 402 KiB | 5 Q