$arr1 = array("a" =＞ array("1" =＞ "2"), 3, 'b'=＞4);
    $arr2 = array(5, "a" =＞ array("6" =＞ "7", "8"), 'b' =＞ 2);
    $result = array_merge_recursive($arr1, $arr2);
    
    var_dump($result);
    ```
    

    	结果：
    
    array(4) {
      ["a"]=＞
      array(3) {
        [1]=＞
        string(1) "2"
        [2]=＞
        string(1) "7"
        [3]=＞
        string(1) "8"
      }
      [0]=＞
      int(3)
      ["b"]=＞
      array(2) {
        [0]=＞
        int(4)
        [1]=＞
        int(2)
      }
      [1]=＞
      int(5)
    }
    ```


php 数组 递归 合并 array_merge_recursive