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：

//$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。