PHP-查找数组的父键

进行一些粗略的递归，但应该可以：

function find_parent($array, $needle, $parent = null) {    foreach ($array as $key => $value) {        if (is_array($value)) { $pass = $parent; if (is_string($key)) {     $pass = $key; } $found = find_parent($value, $needle, $pass); if ($found !== false) {     return $found; }        } else if ($key === 'id' && $value === $needle) { return $parent;        }    }    return false;}$parentkey = find_parent($array, '0002');