3v4l.org

run code in 500+ PHP versions simultaneously
<?php $arr = array('224' => 1, '23' =>2, '1'=> 3, '1231' => 4); Var_dump($arr); $products = array_keys($arr); Var_dump($products);
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.6 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
array(4) { [224]=> int(1) [23]=> int(2) [1]=> int(3) [1231]=> int(4) } array(4) { [0]=> int(224) [1]=> int(23) [2]=> int(1) [3]=> int(1231) }
preferences:
97.31 ms | 1472 KiB | 4 Q