array_diff < PHP

The array_diff function returns an array containing all the values from the first array that are not present in any of the other arrays.

    
    $array1 = ["a", "b", "c"];
    $array2 = ["c", "d", "e"];

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

    print_r($arrayDiff);
    // Array
    // (
    //     [0] => a
    //     [1] => b
    // )