3v4l.org

run code in 500+ PHP versions simultaneously
<?php $arrayIn = [ [ 0 => "3", 1 => "12345" ], [ 0 => "2", 1 => "123" ] ]; $arrayOut = []; foreach ($arrayIn as $arr) { $arrayOut[$arr[1]] = $arr[0]; } var_dump($arrayOut);
Output for 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, 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(2) { [12345]=> string(1) "3" [123]=> string(1) "2" }
preferences:
133.65 ms | 1929 KiB | 4 Q