<?php/** * @author chaojie2008@126.com * @date 2012-04-14 * @des 通用树形 * */class Tree{/*** 生成树型结构所需要的2维数组* @var array*/public $arr = array();/*** 生成树型结构所需修饰符号，可以换成图片* @var array*/public $icon = array('│','├','└');public $nbsp = " ";/*** @access private*/public $ret = '';/*** 构造函数，初始化类* @param array 2维数组，例如：* array(* 1 => array('id'=>'1','parentid'=>0,'name'=>'一级栏目一'),* 2 => array('id'=>'2','parentid'=>0,'name'=>'一级栏目二'),* 3 => array('id'=>'3','parentid'=>1,'name'=>'二级栏目一'),* 4 => array('id'=>'4','parentid'=>1,'name'=>'二级栏目二'),* 5 => array('id'=>'5','parentid'=>2,'name'=>'二级栏目三'),* 6 => array('id'=>'6','parentid'=>3,'name'=>'三级栏目一'),* 7 => array('id'=>'7','parentid'=>3,'name'=>'三级栏目二')* )*/public function init($arr=array()){ $this->arr = $arr; $this->ret = ''; return is_array($arr);} /*** 得到父级数组* @param int* @return array*/public function get_parent($myid){$newarr = array();if(!isset($this->arr[$myid])) return false;$pid = $this->arr[$myid]['parent_id'];$pid = $this->arr[$pid]['parent_id'];if(is_array($this->arr)){foreach($this->arr as $id => $a){if($a['parent_id'] == $pid) $newarr[$id] = $a;}}return $newarr;} /*** 得到子级数组* @param int* @return array*/public function get_child($myid){$a = $newarr = array();if(is_array($this->arr)){foreach($this->arr as $id => $a){if($a['parent_id'] == $myid) $newarr[$id] = $a;}}return $newarr ? $newarr : false;} /*** 得到当前位置数组* @param int* @return array*/public function get_pos($myid,&$newarr){$a = array();if(!isset($this->arr[$myid])) return false; $newarr[] = $this->arr[$myid];$pid = $this->arr[$myid]['parent_id'];if(isset($this->arr[$pid])){ $this->get_pos($pid,$newarr);}if(is_array($newarr)){krsort($newarr);foreach($newarr as $v){$a[$v['id']] = $v;}}return $a;} /*** 得到树型结构* @param int ID，表示获得这个ID下的所有子级* @param string 生成树型结构的基本代码，例如："<option value=\$id \$selected>\$spacer\$name</option>"* @param int 被选中的ID，比如在做树型下拉框的时候需要用到* @return string*/public function get_tree($myid, $str, $sid = 0, $adds = '', $str_group = ''){$number=1;$child = $this->get_child($myid);if(is_array($child)){ $total = count($child);foreach($child as $id=>$value){$j=$k='';if($number==$total){$j .= $this->icon[2];}else{$j .= $this->icon[1];$k = $adds ? $this->icon[0] : '';}$spacer = $adds ? $adds.$j : '';$selected = $id==$sid ? 'selected' : '';@extract($value);$parentid == 0 && $str_group ? eval("\$nstr = \"$str_group\";") : eval("\$nstr = \"$str\";");$this->ret .= $nstr;$nbsp = $this->nbsp;$this->get_tree($id, $str, $sid, $adds.$k.$nbsp,$str_group);$number++;}}return $this->ret;} /*** 同上一方法类似,但允许多选*/public function get_tree_multi($myid, $str, $sid = 0, $adds = ''){$number=1;$child = $this->get_child($myid);if(is_array($child)){ $total = count($child);foreach($child as $id=>$a){$j=$k='';if($number==$total){$j .= $this->icon[2];}else{$j .= $this->icon[1];$k = $adds ? $this->icon[0] : '';}$spacer = $adds ? $adds.$j : '';$selected = $this->have($sid,$id) ? 'selected' : '';@extract($a);eval("\$nstr = \"$str\";");$this->ret .= $nstr;$this->get_tree_multi($id, $str, $sid, $adds.$k.' ');$number++;}}return $this->ret;} /*** @param integer $myid 要查询的ID* @param string $str 第一种HTML代码方式* @param string $str2 第二种HTML代码方式* @param integer $sid 默认选中* @param integer $adds 前缀*/public function get_tree_category($myid, $str, $str2, $sid = 0, $adds = ''){$number=1;$child = $this->get_child($myid);if(is_array($child)){ $total = count($child);foreach($child as $id=>$a){$j=$k='';if($number==$total){$j .= $this->icon[2];}else{$j .= $this->icon[1];$k = $adds ? $this->icon[0] : '';}$spacer = $adds ? $adds.$j : '';$selected = $this->have($sid,$id) ? 'selected' : '';@extract($a);if (empty($html_disabled)) {eval("\$nstr = \"$str\";");} else {eval("\$nstr = \"$str2\";");}$this->ret .= $nstr;$this->get_tree_category($id, $str, $str2, $sid, $adds.$k.' ');$number++;}}return $this->ret;}/** * 同上一类方法，jquery treeview 风格，可伸缩样式（需要treeview插件支持） * @param $myid 表示获得这个ID下的所有子级 * @param $effected_id 需要生成treeview目录数的id * @param $str 末级样式 * @param $str2 目录级别样式 * @param $showlevel 直接显示层级数，其余为异步显示，0为全部限制 * @param $style 目录样式 默认 filetree 可增加其他样式如'filetree treeview-famfamfam' * @param $currentlevel 计算当前层级，递归使用 适用改函数时不需要用该参数 * @param $recursion 递归使用 外部调用时为FALSE */ function get_treeview($myid,$effected_id='example',$str="<span class='file'>\$name</span>", $str2="<span class='folder'>\$name</span>" ,$showlevel = 0 ,$style='filetree ' , $currentlevel = 1,$recursion=FALSE) { $child = $this->get_child($myid); if(!defined('EFFECTED_INIT')){ $effected = ' id="'.$effected_id.'"'; define('EFFECTED_INIT', 1); } else { $effected = ''; }$placeholder = '<ul><li><span class="placeholder"></span></li></ul>'; if(!$recursion) $this->str .='<ul'.$effected.' class="'.$style.'">'; foreach($child as $id=>$a) { @extract($a);if($showlevel > 0 && $showlevel == $currentlevel && $this->get_child($id)) $folder = 'hasChildren'; //如设置显示层级模式@2011.07.01 $floder_status = isset($folder) ? ' class="'.$folder.'"' : ''; $this->str .= $recursion ? '<ul><li'.$floder_status.' id=\''.$id.'\'>' : '<li'.$floder_status.' id=\''.$id.'\'>'; $recursion = FALSE; if($this->get_child($id)){ eval("\$nstr = \"$str2\";"); $this->str .= $nstr; if($showlevel == 0 || ($showlevel > 0 && $showlevel > $currentlevel)) {$this->get_treeview($id, $effected_id, $str, $str2, $showlevel, $style, $currentlevel+1, TRUE);} elseif($showlevel > 0 && $showlevel == $currentlevel) {$this->str .= $placeholder;} } else { eval("\$nstr = \"$str\";"); $this->str .= $nstr; } $this->str .=$recursion ? '</li></ul>': '</li>'; } if(!$recursion) $this->str .='</ul>'; return $this->str; }/** * 获取子栏目json * Enter description here ... * @param unknown_type $myid */public function creat_sub_json($myid, $str='') {$sub_cats = $this->get_child($myid);$n = 0;if(is_array($sub_cats)) foreach($sub_cats as $c) {$data[$n]['id'] = iconv(CHARSET,'utf-8',$c['catid']);if($this->get_child($c['catid'])) {$data[$n]['liclass'] = 'hasChildren';$data[$n]['children'] = array(array('text'=>' ','classes'=>'placeholder'));$data[$n]['classes'] = 'folder';$data[$n]['text'] = iconv(CHARSET,'utf-8',$c['catname']);} else {if($str) {@extract(array_iconv($c,CHARSET,'utf-8'));eval("\$data[$n]['text'] = \"$str\";");} else {$data[$n]['text'] = iconv(CHARSET,'utf-8',$c['catname']);}}$n++;}return json_encode($data);}private function have($list,$item){return(strpos(',,'.$list.',',','.$item.','));}}
