3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = ['foo' => 'bar']; $b = ['foo' => ['bar' => null, 'buz' => null]]; // you need to fix this or special case int keys $c = ['foo' => ['bar' => 'buz']]; function treeMe($array) { if (!is_array($array) || !$array) { return $array; } $tmp = []; foreach ($array as $k => $v) { $tmp[$k] = treeMe($v); } return $tmp; } var_dump(treeMe($a)); var_dump(treeMe($b)); var_dump(treeMe($c));
Output for 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 - 7.1.25, 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 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
array(1) { ["foo"]=> string(3) "bar" } array(1) { ["foo"]=> array(2) { ["bar"]=> NULL ["buz"]=> NULL } } array(1) { ["foo"]=> array(1) { ["bar"]=> string(3) "buz" } }
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/GrZis on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/GrZis on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/GrZis on line 3
Process exited with code 255.

preferences:
255.44 ms | 401 KiB | 327 Q