精品_无限分类

<?php
header("Content-Type:text/html; charset=utf-8");
$data = array(
    array('cid'=>26,'parent_cid'=>0,'name'=>"饭"),
    array('cid'=>27,'parent_cid'=>26,'name'=>"米饭"),
    array('cid'=>28,'parent_cid'=>27,'name'=>"蛋炒饭"),
    array('cid'=>29,'parent_cid'=>28,'name'=>"粗茶淡饭")
	);
//两次循环组装array的树形态
/*
*  @$date:
*  @$root:
*  @$cid:
*  @$pid:
*  @$child:
*/
function data2tree($data,$root=0,$cid='id',$pid='pid',$child="_child")
{
     $tree = array();
     $_temp = array();
     foreach($data as $key=>$val)
     {
     	 $_temp[$val[$cid]] = & $data[$key];
     }
     //$data[0]['name']="饭xx";
     //var_dump($_temp);

     

     foreach($data as $key=>$val)
     {
     	$parentId = $val[$pid]; //上级id
     	if($root == $parentId)
     	{
     		$tree[] = &$data[$key];
     	}else{
     		if(isset($_temp[$parentId])) //判断在$_temp数组中是否存在该父元素
     		{
     			$parent = &$_temp[$parentId]; //将这个父级用引用放处到一个$parent变量中去
     			$parent[$child][]=&$data[$key]; //设置当前元素为$parent元素的子元素
     		}
     	}
     }
     return $tree;
}

//递归输出数据
function output($tree)
{
	if(count($tree)>=1)
	{
		foreach($tree as $v)
		{
		    echo "<li>{$v['name']}";
		    if(isset($v['_child']) && count($v['_child']) >=1)
		    {
		    	echo "<ul>".output($v['_child'])."</ul>";
		    }
		    echo "</li>";
		}
	}
}
$tree = data2tree ( $data, 0, 'cid', 'parent_cid' );
output($tree);
echo "<BR><BR><BR>";


$items = array(
    1 => array('id' => 1, 'pid' => 0, 'name' => '江西省'),
    2 => array('id' => 2, 'pid' => 0, 'name' => '黑龙江省'),
    3 => array('id' => 3, 'pid' => 1, 'name' => '南昌市'),
    4 => array('id' => 4, 'pid' => 2, 'name' => '哈尔滨市'),
    5 => array('id' => 5, 'pid' => 2, 'name' => '鸡西市'),
    6 => array('id' => 6, 'pid' => 4, 'name' => '香坊区'),
    7 => array('id' => 7, 'pid' => 4, 'name' => '南岗区'),
    8 => array('id' => 8, 'pid' => 6, 'name' => '和兴路'),
    9 => array('id' => 9, 'pid' => 7, 'name' => '西大直街'),
    10 => array('id' => 10, 'pid' => 8, 'name' => '东北林业大学'),
    11 => array('id' => 11, 'pid' => 9, 'name' => '哈尔滨工业大学'),
    12 => array('id' => 12, 'pid' => 8, 'name' => '哈尔滨师范大学'),
    13 => array('id' => 13, 'pid' => 1, 'name' => '赣州市'),
    14 => array('id' => 14, 'pid' => 13, 'name' => '赣县'),
    15 => array('id' => 15, 'pid' => 13, 'name' => '于都县'),
    16 => array('id' => 16, 'pid' => 14, 'name' => '茅店镇'),
    17 => array('id' => 17, 'pid' => 14, 'name' => '大田乡'),
    18 => array('id' => 18, 'pid' => 16, 'name' => '义源村'),
    19 => array('id' => 19, 'pid' => 16, 'name' => '上坝村'),
);

function getTree9($items)
{
	 $tree = array();
	 foreach ($items as $item) 
	 {
	 	if(isset($items[$item['pid']])) //判断父ID是否存在
	 	{
	 		$items[$item['pid']]['son'][] = &$items[$item['id']];
	 	}else{
	 		$tree[] = &$items[$item['id']];
	 	}
	 }
	 return $tree;
}

//$arr = getTree9($items);
//var_dump($arr);
function getTree5($items){
	foreach($items as $item){
		$items[$item['pid']]['son'][$item['id']] = &$items[$item['id']];	
	}
	return isset($items[0]['son']) ? $items[0]['son'] : array();
}
$arr = getTree5($items);
var_dump($arr);


?>