phpHow to append array to another array

$arr1 = [1,2];
$arr2 = [3,4];
$res = array_merge($arr1, $arr2);ctrl + cgithub

`$arr1, $arr2` arrays to append to each other	`array_merge` will append given arrays to each other
`$res` will store resulting array

<?php

$arr1 = [1,2];
$arr2 = [3,4];
$res = array_merge($arr1, $arr2);

print_r($res);

Array
(
    [0] => 1
    [1] => 2
    [2] => 3
    [3] => 4
)