php实现递归与无限分类的方法_PHP教程

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echo "

";

            
$area = array(
            
array('id'=>1,'area'=>'北京','pid'=>0),
            
array('id'=>2,'area'=>'广西','pid'=>0),
            
array('id'=>3,'area'=>'广东','pid'=>0),
            
array('id'=>4,'area'=>'福建','pid'=>0),
            
array('id'=>11,'area'=>'朝阳区','pid'=>1),
            
array('id'=>12,'area'=>'海淀区','pid'=>1),
            
array('id'=>21,'area'=>'南宁市','pid'=>2),
            
array('id'=>45,'area'=>'福州市','pid'=>4),
            
array('id'=>113,'area'=>'亚运村','pid'=>11),
            
array('id'=>115,'area'=>'奥运村','pid'=>11),
            
array('id'=>234,'area'=>'武鸣县','pid'=>21)
            
);
            
 
            
function t($arr,$pid=0,$lev=0){
            
static $list = array();
            
foreach($arr as $v){
            
if($v['pid']==$pid){
            
echo str_repeat("  ",$lev).$v['area']."
";
            
//这里

$list[] = $v;

t($arr,$v['id'],$lev+1);

}

}

return $list;

}

$list = t($area);

echo "

print_r($list);

?>