3v4l.org

run code in 300+ PHP versions simultaneously
<?php define('CHECK_ACCESS', true); (!defined('CHECK_ACCESS')) ? die('JEF'); : echo null;
Output for 5.3.0 - 5.3.28, 5.4.0 - 5.4.24, 5.5.0 - 5.5.8
Parse error: syntax error, unexpected ';' in /in/jvFVS on line 5
Process exited with code 255.

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