<?php
$categories = array(
array('id'=>1,'name'=>'电脑','pid'=>0),
array('id'=>2,'name'=>'手机','pid'=>0),
array('id'=>3,'name'=>'笔记本','pid'=>1),
array('id'=>4,'name'=>'台式机','pid'=>1),
array('id'=>5,'name'=>'智能机','pid'=>2),
array('id'=>6,'name'=>'功能机','pid'=>2),
array('id'=>7,'name'=>'超级本','pid'=>3),
array('id'=>8,'name'=>'游戏本','pid'=>3),
);
$tree = array();
//第一步,将分类id作为数组key,并创建children单元
foreach($categories as $category){
$tree[$category['pid']] = $category;
$tree[$category['pid']]['parent'] = array();
}
echo '<pre>';print_r($tree);
//第二部,利用引用,将每个分类添加到父类children数组中,这样一次遍历即可形成树形结构。
foreach ($tree as $k=>$item) {
if ($item['pid'] != 0) {
$tree[$item['pid']]['parent'][] = &$tree[$k];
}
}
preferences:
59.09 ms | 402 KiB | 5 Q