如何判断一个数组是否存在于二维数组中

[php]代码库

$needle = array("name" => 3333, "id" => 3);

$haystack = array(
0 => array("name" => 1111, "id" => 1),
1 => array("name" => 2222, "id" => 2),
2 => array("name" => 3333, "id" => 3),
3 => array("name" => 4444, "id" => 4),
4 => array("name" => 5555, "id" => 3)
);

var_dump(strpos(json_encode($haystack), json_encode($needle)));