3v4l.org

run code in 300+ PHP versions simultaneously
<?php $w = 'Stackoverflow'; foreach($w as $k => $v) { echo dechex($k), ' ', $v, PHP_EOL; }
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Warning: foreach() argument must be of type array|object, string given in /in/7t4MS on line 4
Output for 4.3.0 - 4.3.10, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 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, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Warning: Invalid argument supplied for foreach() in /in/7t4MS on line 4
Output for 4.3.11
preferences:
268.01 ms | 401 KiB | 460 Q