3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $username = 'at' var_dump(preg_match('/_/', $username);
Output for 5.4.0 - 5.4.29
Parse error: syntax error, unexpected 'var_dump' (T_STRING) in /in/thB4C on line 3
Process exited with code 255.
Output for 5.3.0 - 5.3.28
Parse error: syntax error, unexpected T_STRING in /in/thB4C on line 3
Process exited with code 255.