use array_push in php code example
Example 1: php append to array
$myArr = [1, 2, 3, 4];
array_push($myArr, 5, 8);
print_r($myArr); // [1, 2, 3, 4, 5, 8]
$myArr[] = -1;
print_r($myArr); // [1, 2, 3, 4, 5, 8, -1]
Example 2: array_push
$array[$key] = $value;
// or
$array[] = $value;
// or
array_push($array, [ mixed $... ]);