欢迎您访问程序员文章站本站旨在为大家提供分享程序员计算机编程知识!
您现在的位置是: 首页  >  后端开发

PHP递归遍历多维数组实现无限分类的方法

程序员文章站 2022-05-11 20:02:23
...
本文实例讲述了PHP递归遍历多维数组实现无限分类的方法。分享给大家供大家参考,具体如下:
<?php
   //$data[]=array('id'=>1,'parentid'=>0,'name'=>'中国','img'=>'52091199');
   $data[]=array('id'=>1,'parentid'=>0,'name'=>'中国');
   $data[]=array('id'=>2,'parentid'=>0,'name'=>'美国');
   $data[]=array('id'=>3,'parentid'=>0,'name'=>'韩国');
   $data[]=array('id'=>4,'parentid'=>1,'name'=>'北京');
   $data[]=array('id'=>5,'parentid'=>1,'name'=>'上海');
   $data[]=array('id'=>6,'parentid'=>1,'name'=>'广西');
   $data[]=array('id'=>7,'parentid'=>6,'name'=>'桂林');
   $data[]=array('id'=>8,'parentid'=>6,'name'=>'南宁');
   $data[]=array('id'=>9,'parentid'=>6,'name'=>'柳州');
   $data[]=array('id'=>10,'parentid'=>2,'name'=>'纽约');
   $data[]=array('id'=>11,'parentid'=>2,'name'=>'华盛顿');
   $data[]=array('id'=>12,'parentid'=>3,'name'=>'首尔');
   $tree=build_tree($data,0);
   //echo memory_get_usage();
   print_r($tree);
 function findChild(&$arr,$id){
  $childs=array();
  foreach ($arr as $k => $v){
   if($v['parentid']== $id){
    $childs[]=$v;
   }
  }
  return $childs;
 }
 function build_tree($rows,$root_id){
  $childs=findChild($rows,$root_id);
  if(empty($childs)){
   return null;
  }
 foreach ($childs as $k => $v){
  $rescurTree=build_tree($rows,$v['id']);
  if( null != $rescurTree){
  $childs[$k]['childs']=$rescurTree;
  }
 }
  return $childs;
 }
?>

运行结果:

Array
(
 [0] => Array
  (
   [id] => 1
   [parentid] => 0
   [name] => 中国
   [childs] => Array
    (
     [0] => Array
      (
       [id] => 4
       [parentid] => 1
       [name] => 北京
      )
     [1] => Array
      (
       [id] => 5
       [parentid] => 1
       [name] => 上海
      )
     [2] => Array
      (
       [id] => 6
       [parentid] => 1
       [name] => 广西
       [childs] => Array
        (
         [0] => Array
          (
           [id] => 7
           [parentid] => 6
           [name] => 桂林
          )
         [1] => Array
          (
           [id] => 8
           [parentid] => 6
           [name] => 南宁
          )
         [2] => Array
          (
           [id] => 9
           [parentid] => 6
           [name] => 柳州
          )
        )
      )
    )
  )
 [1] => Array
  (
   [id] => 2
   [parentid] => 0
   [name] => 美国
   [childs] => Array
    (
     [0] => Array
      (
       [id] => 10
       [parentid] => 2
       [name] => 纽约
      )
     [1] => Array
      (
       [id] => 11
       [parentid] => 2
       [name] => 华盛顿
      )
    )
  )
 [2] => Array
  (
   [id] => 3
   [parentid] => 0
   [name] => 韩国
   [childs] => Array
    (
     [0] => Array
      (
       [id] => 12
       [parentid] => 3
       [name] => 首尔
      )
    )
  )
)

希望本文所述对大家PHP程序设计有所帮助。

更多PHP递归遍历多维数组实现无限分类的方法相关文章请关注PHP中文网!