php数组在两个数组上是唯一的

Question

两个PHP数组:

$array1 = array(1,2,3,4,5);
$array2 = array(1,2,3,4,5,6,7,8,9,10);

现在我怎么能得到这样的数组:

$array3 = array(6,7,8,9,10);

Answer 1

用array_diff:

$array3 = array_diff($array2, $array1);