php 无限级分类

无限级分类

无限级类

copy<?php

Class UnLimitTree
{
    //组合一维数组
    Static Public function unlimitedForLevel($cate, $html = '--', $pid = 0, $level = 0)
    {
        $arr = array();
        foreach ($cate as $k => $v) {
            if ($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;
    }

    //传递一个子分类ID返回所有的父级分类
    Static Public function getParents($cate, $id)
    {
        $arr = array();
        foreach ($cate as $v) {
            if ($v['id'] == $id) {
                $arr[] = $v;
                $arr = array_merge(self::getParents($cate, $v['pid']), $arr);
            }
        }
        return $arr;
    }

    //传递一个父级分类ID返回所有子分类ID
    Static Public function getChildsId($cate, $pid)
    {
        $arr = array();
        foreach ($cate as $v) {
            if ($v['pid'] == $pid) {
                $arr[] = $v['id'];
                $arr = array_merge($arr, self::getChildsId($cate, $v['id']));
            }
        }
        return $arr;
    }

    //传递一个父级分类ID返回所有子分类
    Static Public function getChilds($cate, $pid)
    {
        $arr = array();
        foreach ($cate as $v) {
            if ($v['pid'] == $pid) {
                $arr[] = $v;
                $arr = array_merge($arr, self::getChilds($cate, $v['id']));
            }
        }
        return $arr;
    }
}

使用

copy$cate = array(
	0 => array('id' => 1, 'pid' => 0, 'name' => '江西省'),
	1 => array('id' => 2, 'pid' => 0, 'name' => '浙江省'),
	2 => array('id' => 3, 'pid' => 1, 'name' => '上饶市'),
	3 => array('id' => 4, 'pid' => 3, 'name' => '广丰县'),
	4 => array('id' => 5, 'pid' => 2, 'name' => '杭州市'),
	5 => array('id' => 6, 'pid' => 5, 'name' => '西湖'),
	6 => array('id' => 7, 'pid' => 6, 'name' => '断桥'),
);

print_r(UnLimitTree ::unlimitedForLevel($cate));
//print_r(UnLimitTree ::unlimitedForLayer($cate));
//print_r(UnLimitTree ::getParents($cate,7));
//print_r(UnLimitTree ::getChildsId($cate,2));
//print_r(UnLimitTree ::getChilds($cate,2));