PHP - 如何在Cookie裡存array?

$test=array(1,2,3);

setcookie("x",serialize($test));

echo 'array(1,2,3)存到cookie後變這樣-> '.$_COOKIE["x"];

$x2=unserialize($_COOKIE["x"]);

echo '<br>array是不是回來了呢?<br>';

print_r ($x2);


參考下面
php cookie 存 array