3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump(preg_match(/#user_id/, 'http://c.cpa6.ru/3U9P/#user_id#'))
Output for 5.3.0 - 5.3.26, 5.4.0 - 5.4.16
Parse error: syntax error, unexpected '/', expecting ')' in /in/54oRL on line 2
Process exited with code 255.
preferences:
171.38 ms | 1399 KiB | 51 Q