PHP实现无限级分类
发布时间:2023-12-31 17:43:10 所属栏目:PHP教程 来源:DaWei
导读: 实现代码:
<?PHP
include("tree.class.PHP");
//具有这个结构的数组,不是这样的话,可以改类的实现
$list = array(
1 => array('id' => '1','pid
<?PHP
include("tree.class.PHP");
//具有这个结构的数组,不是这样的话,可以改类的实现
$list = array(
1 => array('id' => '1','pid
实现代码: <?PHP include("tree.class.PHP"); //具有这个结构的数组,不是这样的话,可以改类的实现 $list = array( 1 => array('id' => '1','pid' => 0,'name' => '一级栏目一'), 2 => array('id' => '2','name' => '一级栏目二'), 3 => array('id' => '3','pid' => 1,'name' => '二级栏目一'), 4 => array('id' => '4','name' => '二级栏目二'), 5 => array('id' => '5','pid' => 2,'name' => '二级栏目三'), 6 => array('id' => '6','pid' => 3,'name' => '三级栏目一'), 7 => array('id' => '7','name' => '三级栏目二') ); $tree = new tree($list); $html = "<select name='cat'>"; $str = "<option value=$id $selected>$spacer$name</option>"; $html .= $tree->get_tree(0,$str,$selected=4); $html .= "</select>"; echo($html); ?> 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 $ret = ''; /** * 构造函数,初始化类 * @param array 2维数组,例如: * array( * 1 => array('id'=>'1','parentid'=>0,'name'=>'一级栏目一'), * 2 => array('id'=>'2','name'=>'一级栏目二'), * 3 => array('id'=>'3','parentid'=>1,'name'=>'二级栏目一'), * 4 => array('id'=>'4','name'=>'二级栏目二'), * 5 => array('id'=>'5','parentid'=>2,'name'=>'二级栏目三'), * 6 => array('id'=>'6','parentid'=>3,'name'=>'三级栏目一'), * 7 => array('id'=>'7','name'=>'三级栏目二') * ) */ public function __construct($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$name</option>" * @param int 被选中的ID,比如在做树型下拉框的时候需要用到,不填默认选第一个 * @return string */ public function get_tree($myid,$sid = 0,$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,$sid,$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,$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,$adds.$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,$str2,$id) ? 'selected' : ''; @extract($a); if (empty($html_disabled)) { eval("$nstr = "$str";"); } else { eval("$nstr = "$str2";"); } $this->ret .= $nstr; $this->get_tree_category($id,$adds.$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,$filetree ',$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,$effected_id,$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,$c['catname']); } else { if($str) { @extract(array_iconv($c,CHARSET,'utf-8')); eval("$data[$n]['text'] = "$str";"); } else { $data[$n]['text'] = iconv(CHARSET,$c['catname']); } } $n++; } return json_encode($data); } private function have($list,$item){ return(strpos(','.$list.',','.$item.',')); } } /** * +------------------------------------------------ * 格式化数组 * +------------------------------------------------ */ function getArray($myid = 0,$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 . $j : ''; @extract($a); $a[$name] = $spacer . $a[$name]; $this->ret[$a[$id]] = $a; $fd = $adds . $k . $this->nbsp; $this->getArray($id,$fd); $number++; } } return $this->ret; } ?> (编辑:武汉站长网) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |
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