3v4l.org

run code in 300+ PHP versions simultaneously
<?php constant \true = false; define(TRUE, FALSE); define(FALSE, TRUE); define(0, 1); if(0) echo 'no';
Output for 5.3.0 - 5.3.27, 5.4.0 - 5.4.20, 5.5.0 - 5.5.4
Parse error: syntax error, unexpected '=' in /in/TkkrP on line 2
Process exited with code 255.
preferences:
175.95 ms | 1400 KiB | 61 Q