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php无限分类且支持输出树状图的详细介绍

2018-12-30 PHP 前端之家

前端之家收集整理的这篇文章主要介绍了php无限分类且支持输出树状图的详细介绍，前端之家小编觉得挺不错的，现在分享给大家，也给大家做个参考。

<div class="codetitle"><a style="CURSOR: pointer" data="91317" class="copybut" id="copybut91317" onclick="doCopy('code91317')"> 代码如下:

<div class="codebody" id="code91317">@H_301_2@<?PHP@H_3012@/**@H301_2@ 通用的树型类，可以生成任何树型结构@H_301_2@/@H_3012@class tree@H3012@{@H3012@ /**@H301_2@ 生成树型结构所需要的2维数组@H_301_2@ @var array@H_3012@ */@H3012@ var $arr = array(); /**@H301_2@ 生成树型结构所需修饰符号，可以换成图片@H_301_2@ @var array@H_3012@ */@H3012@ var $icon = array('│','├','└'); /**@H3012@ * @access private@H3012@ */@H3012@ var $ret = ''; /**@H301_2@ 构造函数，初始化类@H_301_2@ @param array 2维数组，例如：@H_3012@ * array(@H3012@ * 1 => array('id'=>'1','parentid'=>0,'name'=>'一级栏目一'),@H3012@ * 2 => array('id'=>'2','name'=>'一级栏目二'),@H3012@ * 3 => array('id'=>'3','parentid'=>1,'name'=>'二级栏目一'),@H3012@ * 4 => array('id'=>'4','name'=>'二级栏目二'),@H3012@ * 5 => array('id'=>'5','parentid'=>2,'name'=>'二级栏目三'),@H3012@ * 6 => array('id'=>'6','parentid'=>3,'name'=>'三级栏目一'),@H3012@ * 7 => array('id'=>'7','name'=>'三级栏目二')@H3012@ * )@H3012@ */@H3012@ function tree($arr=array())@H3012@ {@H3012@ $this->arr = $arr;@H3012@ $this->ret = '';@H301_2@ return isarray($arr);@H3012@ } /**@H3012@ * 得到父级数组@H3012@ * @param int@H3012@ * @return array@H3012@ */@H301_2@ function getparent($myid)@H3012@ {@H3012@ $newarr = array();@H3012@ if(!isset($this->arr[$myid])) return false;@H3012@ $pid = $this->arr[$myid]['parentid'];@H3012@ $pid = $this->arr[$pid]['parentid'];@H301_2@ if(isarray($this->arr))@H3012@ {@H3012@ foreach($this->arr as $id => $a)@H3012@ {@H3012@ if($a['parentid'] == $pid) $newarr[$id] = $a;@H3012@ }@H3012@ }@H3012@ return $newarr;@H3012@ } /**@H3012@ * 得到子级数组@H3012@ * @param int@H3012@ * @return array@H3012@ */@H301_2@ function getchild($myid)@H3012@ {@H3012@ $a = $newarr = array();@H301_2@ if(isarray($this->arr))@H3012@ {@H3012@ foreach($this->arr as $id => $a)@H3012@ {@H3012@ if($a['parentid'] == $myid) $newarr[$id] = $a;@H3012@ }@H3012@ }@H3012@ return $newarr ? $newarr : false;@H3012@ } /**@H3012@ * 得到当前位置数组@H3012@ * @param int@H3012@ * @return array@H3012@ */@H301_2@ function getpos($myid,&$newarr)@H3012@ {@H3012@ $a = array();@H3012@ if(!isset($this->arr[$myid])) return false;@H3012@ $newarr[] = $this->arr[$myid];@H3012@ $pid = $this->arr[$myid]['parentid'];@H3012@ if(isset($this->arr[$pid]))@H3012@ {@H301_2@ $this->getpos($pid,$newarr);@H3012@ }@H301_2@ if(isarray($newarr))@H3012@ {@H3012@ krsort($newarr);@H3012@ foreach($newarr as $v)@H3012@ {@H3012@ $a[$v['id']] = $v;@H3012@ }@H3012@ }@H3012@ return $a;@H3012@ }@H3012@ /**@H3012@ * -------------------------------------@H3012@ * 得到树型结构@H3012@ * -------------------------------------@H3012@ * @author Midnight(杨云洲),yangyunzhou@foxmail.com@H3012@ * @param $myid 表示获得这个ID下的所有子级@H301_2@ @param $str 生成树形结构基本代码,例如: "<option value=\$id \$select>\$spacer\$name"@H_301_2@ @param $sid 被选中的ID,比如在做树形下拉框的时候需要用到@H_3012@ * @param $adds@H301_2@ @param $strgroup@H301_2@ @return unknowntype@H3012@ */@H301_2@ function get_tree($myid,$str,$sid = 0,$adds = '',$strgroup = '')@H3012@ {@H3012@ $number=1;@H301_2@ $child = $this->getchild($myid);@H301_2@ if(isarray($child))@H3012@ {@H3012@ $total = count($child);@H3012@ foreach($child as $id=>$a)@H3012@ {@H3012@ $j=$k='';@H3012@ if($number==$total)@H3012@ {@H3012@ $j .= $this->icon[2];@H3012@ }@H3012@ else@H3012@ {@H3012@ $j .= $this->icon[1];@H3012@ $k = $adds ? $this->icon[0] : '';@H3012@ }@H3012@ $spacer = $adds ? $adds.$j : '';@H3012@ $selected = $id==$sid ? 'selected' : '';@H3012@ @extract($a);@H301_2@ $parentid == 0 && $str_group ? eval("\$nstr = \"$strgroup\";") : eval("\$nstr = \"$str\";");@H3012@ $this->ret .= $nstr;@H301_2@ $this->get_tree($id,$sid,$adds.$k.'',$strgroup);@H3012@ $number++;@H3012@ }@H3012@ }@H3012@ return $this->ret;@H3012@ }@H3012@ /**@H301_2@ 同上一方法类似,但允许多选@H_301_2@ /@H_301_2@ function get_treemulti($myid,$adds = '')@H3012@ {@H3012@ $number=1;@H301_2@ $child = $this->getchild($myid);@H301_2@ if(isarray($child))@H3012@ {@H3012@ $total = count($child);@H3012@ foreach($child as $id=>$a)@H3012@ {@H3012@ $j=$k='';@H3012@ if($number==$total)@H3012@ {@H3012@ $j .= $this->icon[2];@H3012@ }@H3012@ else@H3012@ {@H3012@ $j .= $this->icon[1];@H3012@ $k = $adds ? $this->icon[0] : '';@H3012@ }@H3012@ $spacer = $adds ? $adds.$j : ''; $selected = $this->have($sid,$id) ? 'selected' : '';@H3012@ //echo $sid.'=>'.$id.' : '.$selected.' .
';@H3012@ @extract($a);@H3012@ eval("\$nstr = \"$str\";");@H3012@ $this->ret .= $nstr;@H301_2@ $this->get_treemulti($id,$adds.$k.'');@H3012@ $number++;@H3012@ }@H3012@ }@H3012@ return $this->ret;@H3012@ } function have($list,$item){@H3012@ return(strpos(','.$list.',','.$item.','));@H3012@ }@H3012@}@H3012@?>@H3012@

@H301_2@