3v4l.org

run code in 300+ PHP versions simultaneously
<?php $all = array(array("class"=>array(array("peter","15","male"),array("mary","24","female"),array("jason","22","male")))); function merge($prev,$now){ return array_merge($prev,$now['class']); } $cc = array_reduce($all,"merge",array());
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.2, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.7, 7.2.29 - 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 - 8.2.18, 8.3.0 - 8.3.7
Output for 5.0.3 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Warning: array_merge(): Argument #1 is not an array in /in/iZ6ff on line 4

preferences:
198.5 ms | 402 KiB | 309 Q