doupao2277
2013-09-20 10:05
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如何使用递归函数在PHP中获取父数组元素

I have PHP code as below which will print :

id:3deep:2path:image31.jpg

id:4deep:2path:image32.jpg

when I input deep = 2. However I would like to get parent array of this deep which is id = 2. Is there anyways which I can do this?

Note: Please see the result when I input deep as below:

> Deep = 1
  ID = 0
  ID = 1
  ID = 2
  ID = 7
  ID = 8

> Deep = 2
  ID = 2
  ID = 3
  ID = 4

> Deep = 3
  ID = 4
  ID = 5
  ID = 6

Please check my code online at : http://phpfiddle.org/main/code/xxn-7ay

PHP Code

$obj = '{
  "images": {
    "deep": "1",
    "id": "0",
    "path": "image1.jpg",
    "image": [
      {
        "deep": "1",
        "id": "1",
        "coordinate": "(x,y),(x,y)",
        "path": "image2.jpg"
      },
      {
        "deep": "1",
        "id": "2",
        "coordinate": "(x,y),(x,y)",
        "path": "image3.jpg",
        "image": [
          {
            "deep": "2",
            "id": "3",
            "coordinate": "(x,y),(x,y)",
            "path": "image31.jpg"
          },
          {
            "deep": "2",
            "id": "4",
            "coordinate": "(x,y),(x,y)",
            "path": "image32.jpg",
            "image": [
              {
                "deep": "3",
                "id": "5",
                "coordinate": "(x,y),(x,y)",
                "path": "image321.jpg"
              },
              {
                "deep": "3",
                "id": "6",
                "coordinate": "(x,y),(x,y)",
                "path": "image322.jpg"
              }
            ]
          }
        ]
      },
      {
        "deep": "1",
        "id": "7",
        "coordinate": "(x,y),(x,y)",
        "path": "image4.jpg"
      },
      {
        "deep": "1",
        "id": "8",
        "coordinate": "(x,y),(x,y)",
        "path": "image5.jpg"
      }
    ]
  }
}';


$objArray = json_decode($obj,true);


$deep = 2;
$arr = all($objArray['images'], $deep);
display($arr);

function all($a, $d){

    $temp = array();
    if(is_array($a)){

        foreach($a as $v){  
            all($v, $d);
        }
        if(isset($a['deep']) && $d == $a['deep']){
            $temp['id'] = $a['id'];
            $temp['deep'] = $a['deep'];         
            $temp['path'] = $a['path'];


                $s = 
                    'id:'.$a['id'].
                    'deep:'.$a['deep'].
                    'path:'.$a['path'];

            display($s);
        }
    }   
    return ;
}

function display($a){
    echo "<pre>";
    print_r($a);
    echo "</pre>";
}
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