3v4l.org

run code in 300+ PHP versions simultaneously
<?php $d = array ( array ( 'a1' => true, 'b1' => 'abc' , 'c1' => 'def' ), array ( 'a2' => true, 'b2' => 'fgh', 'c2' => 'ijk' , 'd2' => 'lmn' , 'e2' => 'opq' )); function flatten(array $array) { $result = array(); if (is_array($array)) { foreach ($array as $k => $v) { if (is_array($v)) { $result = array_merge($result, flatten($v)); } else { $result[$k] = $v; } } } return $result; } $dd = flatten($d); echo "<pre>"; print_r($dd); echo "</pre>"; ?>
Output for 7.1.0 - 7.1.20, 7.2.0 - 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 - 8.3.4, 8.3.6
<pre>Array ( [a1] => 1 [b1] => abc [c1] => def [a2] => 1 [b2] => fgh [c2] => ijk [d2] => lmn [e2] => opq ) </pre>
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 <pre>Array ( [a1] => 1 [b1] => abc [c1] => def [a2] => 1 [b2] => fgh [c2] => ijk [d2] => lmn [e2] => opq ) </pre>

preferences:
157.56 ms | 402 KiB | 161 Q