array_intersect_key() 這個函式,可以比對出 N 個陣列中相同的index

範例

1$arr1 = array(
2    "a-key" => 1,
3    "b-key" => 2,
4    "c-key" => 3
5);
6 
7$arr2 = array(
8    "a-key" => 3,
9    "b-key" => 4,
10    "d-key" => 4,
11);
12 
13print_r(array_intersect_key($arr1, $arr2));
Categories: PHP