3v4l.org

run code in 300+ PHP versions simultaneously
<?php $abc = 'some string'; $tab = array('some element 1', 'some element 2', 'some thing', 'some string', 'something else'); foreach ($tab as $element) { if (array_key_exist($element, $abc)) { echo 'ok'; } }
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
Fatal error: Uncaught Error: Call to undefined function array_key_exist() in /in/EuBrv:7 Stack trace: #0 {main} thrown in /in/EuBrv on line 7
Process exited with code 255.
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
Fatal error: Call to undefined function array_key_exist() in /in/EuBrv on line 7
Process exited with code 255.
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155.98 ms | 402 KiB | 185 Q