3v4l.org

run code in 300+ PHP versions simultaneously
<?php if (!array_key_exists('REMOTE_ADDR', $_SERVER) { echo 'true'; } else { echo 'false'; } ?>
Output for 5.3.0 - 5.3.27, 5.4.0 - 5.4.20
Parse error: syntax error, unexpected '{' in /in/rfoph on line 3
Process exited with code 255.
preferences:
180.8 ms | 1399 KiB | 56 Q