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 |
13 | print_r( array_intersect_key ( $arr1 , $arr2 )); |