3v4l.org

run code in 300+ PHP versions simultaneously
<?php if (!defined('__DIR__')) { define('__DIR__', dirname(__FILE)); } echo __DIR__;
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Fatal error: Uncaught Error: Undefined constant "__FILE" in /in/DEas0:4 Stack trace: #0 {main} thrown in /in/DEas0 on line 4
Process exited with code 255.
Output for 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Warning: Use of undefined constant __FILE - assumed '__FILE' (this will throw an Error in a future version of PHP) in /in/DEas0 on line 4 /in
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33
/in
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
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preferences:
243.94 ms | 402 KiB | 464 Q