3v4l.org

run code in 300+ PHP versions simultaneously
<?php if(isset(NULL)) { echo "true\n"; } else { echo "false\n"; } ?>
Output for 5.4.0 - 5.4.21
Parse error: syntax error, unexpected ')', expecting :: (T_PAAMAYIM_NEKUDOTAYIM) in /in/cWa2m on line 1
Process exited with code 255.
Output for 5.3.0 - 5.3.27
Parse error: syntax error, unexpected ')', expecting T_PAAMAYIM_NEKUDOTAYIM in /in/cWa2m on line 1
Process exited with code 255.
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189.07 ms | 1395 KiB | 57 Q