PHP: Recursive Array Search Function

function_RecursiveArraySearch.php

<?php

/* 
    =====
    Find integer value of array key for search term in the $needle.
    =====
*/


function recursive_array_search($needle,$haystack) {
    foreach($haystack as $key=>$value) {
        $current_key=$key;
        if($needle===$value OR (is_array($value) && recursive_array_search($needle,$value) !== false)) {
            return $current_key;
        }
    }
    return false;
}
?>