导读：项目开发，经常栏目要做到无限极分类，几种方法
PHP无限极分类的几种方法

 
复制代码 代码如下:
namespace Util;
class Category{
static public function unlimitedForLevel($cate,$html="--",$pid=0,$level=0){
$arr =array();

foreach ($cate as $v) {
if($v['pid'] == $pid){
$v['level'] = $level+1;
$v['html'] = str_repeat($html,$level);
$arr[] = $v;
$arr = array_merge($arr,self::unlimitedForLevel($cate,$html,$v['id'],$level+1));

}
}
return $arr;
}

//组合一个多维数组
static public function unlimitedForlayer($cate,$name='child',$pid=0){
$arr =array();
foreach ($cate as $v) {
if($v['pid'] == $pid){
$v[$name] = self::unlimitedForlayer($cate,$name,$v['id']);
$arr[] = $v;
}
}
return $arr;
}
//传递子分类PID 返回所有父级分类
static public function getParents($cate,$pid){
$arr=array();
foreach ($cate as $v) {
if($v['id'] == $pid){
$arr[] = $v;
$arr =array_merge(self::getParents($cate,$v['pid']), $arr);
}
}
return $arr;
}
//传递父级分类ID，返回子分类ID
static public function getChildsId($cate,$id){
$arr =array();
foreach ($cate as $v) {
if($v['pid'] == $id){
$arr[] = $v['id'];
$arr = array_merge($arr,self::getChildsId($cate,$v['id']));
}
}
return $arr;
}

//传递父级分类ID 返回所有子分类
static public function getChilds($cate,$id){
$arr =array();
foreach ($cate as $v) {
if($v['pid'] == $id){
$arr[] = $v;
$arr =array_merge($arr,self::getChilds($cate,$v['id']));
}
}
return $arr;

}
}

?>

转自【B5教程网】:http://www.bcty365.com/content-10-1097-1.html