PHP递归遍历多维数组实现无限分类的方法

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]<em>8本文来源gao.dai.ma.com搞@代*码(网$</em><pre>搞代gaodaima码

=> 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。

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