<?php /** +------------------------------------------------
- 通用的樹型類 +------------------------------------------------
- @author [email protected] +------------------------------------------------
-
@date 2010年11月23日10:09:31 +------------------------------------------------ */ class Tree {
/** +------------------------------------------------
- 生成樹型結構所需要的2維數組 +------------------------------------------------
- @author [email protected] +------------------------------------------------
-
@var Array */ var $arr = array();
/** +------------------------------------------------
- 生成樹型結構所需修飾符號,可以換成圖片 +------------------------------------------------
- @author [email protected] +------------------------------------------------
-
@var Array */ var $icon = array('│','├',' └');
/**
- @access private */ var $ret = '';
/**
- 構造函數,初始化類
- @param array 2維數組,例如:
- array(
- 1 => array('id'=>'1','parentid'=>0,'name'=>'一級欄目一'),
- 2 => array('id'=>'2','parentid'=>0,'name'=>'一級欄目二'),
- 3 => array('id'=>'3','parentid'=>1,'name'=>'二級欄目一'),
- 4 => array('id'=>'4','parentid'=>1,'name'=>'二級欄目二'),
- 5 => array('id'=>'5','parentid'=>2,'name'=>'二級欄目三'),
- 6 => array('id'=>'6','parentid'=>3,'name'=>'三級欄目一'),
- 7 => array('id'=>'7','parentid'=>3,'name'=>'三級欄目二')
- ) */ function tree($arr=array()) { $this->arr = $arr; $this->ret = ''; return is_array($arr); }
/**
- 得到父級數組
- @param int
- @return array */ 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] = $a;
/**
- 得到子級數組
- @param int
- @return array */ function get_child($myid) { $a = $newarr = array(); if(is_array($this->arr)) { foreach($this->arr as $id => $a) {
if($a['parentid'] == $myid) $newarr[$id] = $a;
/**
- 得到當前位置數組
- @param int
- @return array */ function get_pos($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;
/**
- 得到樹型結構
- @author [email protected]
- @param $myid 表示獲得這個ID下的所有子級
- @param $str 生成樹形結構基本代碼, 例如: "<option value=\$id \$select>\$spacer\$name</option>"
- @param $sid 被選中的ID, 比如在做樹形下拉框的時候需要用到
- @param $adds
-
@param $str_group */ function get_tree($myid, $str, $sid = 0, $adds = '', $str_group = '') { $number=1; $child = $this->get_child($myid); if(is_array($child)) {
$total = count($child); foreach($child as $id=>$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 = $id==$sid ? 'selected' : ''; @extract($a); $parentid == 0 && $str_group ? eval("\$nstr = \"$str_group\";") : eval("\$nstr = \"$str\";"); $this->ret .= $nstr; $this->get_tree($id, $str, $sid, $adds.$k.' ',$str_group); $number++; }
} return $this->ret; }
/**
-
同上一方法類似,但允許多選 */ function get_tree_multi($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 $this->ret; }
function have($list,$item){ return(strpos(',,'.$list.',',','.$item.',')); }
/** +------------------------------------------------
-
- 格式化數組 +------------------------------------------------
-
@author [email protected] +------------------------------------------------ */ function getArray($myid=0, $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 : ''; @extract($a); $a['name'] = $spacer.' '.$a['name']; $this->ret[$a['id']] = $a; $fd = $adds.$k.' '; $this->getArray($id, $sid, $fd); $number++; }
}
return $this->ret; } } ?></pre>
用法:
$tree = new Tree; // new 之前請記得包含tree文件! $tree->tree($data); // 數據格式請參考 tree方法上面的註釋!
// 如果使用數組, 請使用 getArray方法 $tree->getArray();
// 下拉菜單選項使用 get_tree方法 $tree->get_tree();</pre>