Online PHP editor | refs for gsCu3

<?php $haystack = array( 'A', 'B' => array('BA'), 'C' => array('CA' => array('CAA')), 'D' => array('DA' => array('DAA' => array('DAAA'))) ); function array_find($needle, array $haystack) { foreach ($haystack as $value) { if (is_array($value)) { if (in_array($needle, $value)) { return true; } else { if (array_find($needle, $value)) { return true; } } } else { if ($value == $needle) { return true; } } } return false; } $find = array('A', 'BA', 'CAA', 'DAAA'); foreach($find as $needle) { if (array_find($needle, $haystack)) { echo $needle, " found".PHP_EOL; } else { echo $needle, " not found".PHP_EOL; } }