wemall doraemon是Android客户端程序，服务端采用wemall微信商城，不对原商城做任何修改，只需要在原商城目录下上传接口文件即可完成服务端的配置，客户端可随意定制修改。本文分享其中关于基于PHP的通用的树型类代码，供技术员参考学习。

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<?php
/**
+------------------------------------------------
* 通用的树型类
* 请使用的朋友注意 id, name, pid 这三个下标, id的值与数组下标必须吻合
+------------------------------------------------
* @author yangyunzhou@foxmail.com
+------------------------------------------------
* @date 2010年11月23日10:09:31
+------------------------------------------------
*/
class Tree {
/**
* +------------------------------------------------
* 生成树型结构所需要的2维数组
* +------------------------------------------------
*
* @author yangyunzhou@foxmail.com
* +------------------------------------------------
* @var Array
*/
var $arr = array ();
/**
* +------------------------------------------------
* 生成树型结构所需修饰符号，可以换成图片
* +------------------------------------------------
*
* @author yangyunzhou@foxmail.com
* +------------------------------------------------
* @var Array
*/
var $icon = array (
'│',
'├─',
'└─'
);
/**
*
* @access private
*/
var $ret = '';
/**
* 构造函数，初始化类
*
* @param
* array 2维数组，例如：
* array(
* 1 => array('id'=>'1','pid'=>0,'name'=>'一级栏目一'),
* 2 => array('id'=>'2','pid'=>0,'name'=>'一级栏目二'),
* 3 => array('id'=>'3','pid'=>1,'name'=>'二级栏目一'),
* 4 => array('id'=>'4','pid'=>1,'name'=>'二级栏目二'),
* 5 => array('id'=>'5','pid'=>2,'name'=>'二级栏目三'),
* 6 => array('id'=>'6','pid'=>3,'name'=>'三级栏目一'),
* 7 => array('id'=>'7','pid'=>3,'name'=>'三级栏目二')
* )
*/
function tree($arr = array()) {
$this->arr = $arr;
$this->ret = '';
return is_array ( $arr );
}
/**
* 得到父级数组
*
* @param
* int
* @return array
*/
function get_parent($myid) {
$newarr = array ();
if (! isset ( $this->arr [$myid] ))
return false;
$pid = $this->arr [$myid] ['pid'];
$pid = $this->arr [$pid] ['pid'];
if (is_array ( $this->arr )) {
foreach ( $this->arr as $id => $a ) {
if ($a ['pid'] == $pid)
$newarr [$id] = $a;
}
}
return $newarr;
}
/**
* 得到子级数组
*
* @param
* int
* @return array
*/
function get_child($myid) {
$a = $newarr = array ();
if (is_array ( $this->arr )) {
foreach ( $this->arr as $id => $a ) {
if ($a ['pid'] == $myid)
$newarr [$id] = $a;
}
}
return $newarr ? $newarr : false;
}
/**
* 得到当前位置数组
*
* @param
* int
* @return array
*/
function get_pos($myid, &$newarr) {
$a = array ();
if (! isset ( $this->arr [$myid] ))
return false;
$newarr [] = $this->arr [$myid];
$pid = $this->arr [$myid] ['pid'];
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
* -------------------------------------
*
* @author yangyunzhou@foxmail.com
* @param $myid 表示获得这个ID下的所有子级
* @param $str 生成树形结构基本代码,
* 例如: "<option value=\$id \$select>\$spacer\$name</option>"
* @param $sid 被选中的ID,
* 比如在做树形下拉框的时候需要用到
* @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 $this->ret;
}
/**
* 同上一方法类似,但允许多选
*/
function get_tree_multi($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 . ',', ',' . $item . ',' ));
}
/**
* +------------------------------------------------
* 格式化数组
* +------------------------------------------------
*
* @author yangyunzhou@foxmail.com
* +------------------------------------------------
*/
function getArray($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 [1];
} 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;
}
}
?>

原文详情地址：http://git.oschina.net/zzunet/wemall-doraemon/commit/e8f303df5663dc69fe47bb9623222149d40e3956

wemall doraemonAndroid app商城详情地址：http://www.koahub.com/home/product/55

wemall官网地址：http://www.wemallshop.com

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wemall app商城源码中基于PHP的通用的树型类代码

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