3v4l.org

run code in 300+ PHP versions simultaneously
<?php $array = array( 'a' => '', 'b' => '', 'c' => array( 'd' => '', 'e' => '', 'f' => array( 'g' => '', 'h' => '', 'i' => '', ), ), ); echo (_array_key_exists_r($array, 'a')) ? 'aye' : 'nah'; function _array_key_exists_r($array, $key) { foreach ($array as $index => $subarray) { if ($index == $key) return TRUE; elseif (is_array($subarray)) return _array_key_exists_r($subarray, $key); } return FALSE; }
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.21, 7.0.0 - 7.0.20, 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 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
aye
preferences:
228.4 ms | 406 KiB | 357 Q