<?php include 'tree.class.php'; //模拟数据库 $data=array( array('id'=>1,'pid'=>0,'name'=>'一级栏目一'), array('id'=>2,'pid'=>0,'name'=>'一级栏目二'), array('id'=>3,'pid'=>1,'name'=>'二级栏目一'), array('id'=>4,'pid'=>3,'name'=>'三级栏目一'), array('id'=>5,'pid'=>4,'name'=>'四级栏目一'), ); //转换数据 $tree_data=array(); foreach ($data as $key=>$value){ $tree_data[$value['id']]=array( 'id'=>$value['id'], 'parentid'=>$value['pid'], 'name'=>$value['name'] ); } /** * 输出树形结构 */ $str="<tr> <td><input type='checkbox' value='\$id'></td> <td>\$id</td> <td>\$spacer\$name</td> <td><a href='add.php?id=\$id'>添加</a></td> <td><a href='del.php?id=\$id'>删除</a></td> <td><a href='update.php?id='\$id'>修改</a></td> </tr>"; $tree=new Tree(); $tree->init($tree_data); echo "<table>"; echo $tree->get_tree(0, $str); echo "</table>"; echo "<br/>"; echo "<br/>"; echo "<br/>"; echo "<br/>"; /** * 输出下拉列表 */ $str="<option value=\$id \$selected>\$spacer\$name</option>"; $tree=new Tree(); $tree->init($tree_data); echo "<select>"; echo $tree->get_tree(0, $str,2); echo "</select>";
运行结果：
tree.class.php：
<?php /** * 通用的树型类，可以生成任何树型结构 */ 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]['parentid']; $pid = $this->arr[$pid]['parentid']; if(is_array($this->arr)){ foreach($this->arr as $id => $a){ if($a['parentid'] == $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['parentid'] == $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]['parentid']; 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>\$name</span>", $str2="<span>\$name</span>" ,$showlevel = 0 ,$style='filetree ' , $currentlevel = 1,$recursion=FALSE) { $child = $this->get_child($myid); if(!defined('EFFECTED_INIT')){ $effected = ''; define('EFFECTED_INIT', 1); } else { $effected = ''; } $placeholder = '<ul><li><span></span></li></ul>'; if(!$recursion) $this->str .='<ul'.$effected.'>'; 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) ? '' : ''; $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.',')); } } ?>