删除与另一个多维数组共享键值对的子数组

Question

I have 2 arrays as below. I want to remove data from array2 if array1 has the stu_id. final array should be like result_array.

$array1 = Array
(
    [0] => Array
        (
            [stu_id] => 1
            [name] => mr.a
        )
    [1] => Array
        (
            [stu_id] => 3
            [name] => mr.b
        )
)

$array2 = Array
(
    [0] => Array
        (
            [id] => 1
            [stu_id] => 1
            [data] => abc
        )
    [1] => Array
        (
            [id] => 2
            [stu_id] => 2
            [data] => xyz
        )
    [3] => Array
        (
            [id] => 3
            [stu_id] => 3
            [data] => aaa
        )
)

$result_array = Array
(
    [0] => Array
        (
            [id] => 2
            [stu_id] => 2
            [data] => xyz
        )
)

I tried array_diff, $result_array = array_diff($array2, $array1); but it's not working.

Please help me to do this.

Answer 1

foreach($array1 as $data1){
    foreach($array2 as $k => $data2){
        if($data2["stu_id"] == $data1["stu_id"]){
            unset($array2[$k]);
            break;
        }
    }
}
$result_array = $array2;