PHP - array_merge

    
    $array1 = ['a', 'b', 'c'];
    $array2 = ['d', 'e', 'f'];
    
    $array3 = array_merge($array1, $array2);
    
    var_dump($array3);
    
    //output
    array(6) {
      [0] =>
      string(1) "a"
      [1] =>
      string(1) "b"
      [2] =>
      string(1) "c"
      [3] =>
      string(1) "d"
      [4] =>
      string(1) "e"
      [5] =>
      string(1) "f"
    }