3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arr = array ( "det1" => [1,2,3,4], "det2" => [5,6] ); $new= []; Foreach($arr as $sub){ $new = array_merge($new, $sub); } var_dump($new);
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(6) { [0]=> int(1) [1]=> int(2) [2]=> int(3) [3]=> int(4) [4]=> int(5) [5]=> int(6) }
preferences:
104.84 ms | 1958 KiB | 4 Q