3v4l.org

run code in 300+ PHP versions simultaneously
<?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/ufpsY 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/ufpsY on line 3
Process exited with code 255.
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196.21 ms | 1394 KiB | 66 Q