PHP 判断二维数组中是否存在某个数组

function multidimensional_search($parents, $searched) {
if (empty($searched) || empty($parents)) {
return false;
}

foreach ($parents as $key => $value) {
$exists = true;
foreach ($searched as $skey => $svalue) {
$exists = ($exists && IsSet($parents[$key][$skey]) && $parents[$key][$skey] == $svalue);
}
if($exists){
return $key;
}
}
return false;
}