PHP编程：ThinkPHP添加更新标签的方法

public function updateTag($vo,$module) {?
?$recordId= trim($vo['id']);?
?
if($vo['keywords']==''){//如果没有标签,则把原来的标签删除?
???? $this->deltag($recordId);?????
?? }else{?
????? $newtags = explode(' ',$vo['keywords']);//获取更新的标签并转为数组(keywords是这里的标签字段,在thinkphp的拓展案例blog为tags,注意)
?
?? $condition['recordId'] = $recordId;//当有多个标签时,将查询多篇日记,而不是一篇?
?
?$tagged=M('Tagged');?
?
? $tag=M('Tag');??????????
?
? $taggedlist= $tagged->where($condition)->select();?
?
if($taggedlist !==false){?
?
foreach ($taggedlist as $key => $value) {?
?
? $tagId=trim($value['tagId']);?
?
? $tagvo=$tag->where('id='.$tagId)->find();?
?
? $oldtags[]=$tagvo['name'];//获取原来的标签?
?
? }????
?
?? $result=count(array_diff(array_diff($newtags,$oldtags),array_diff($oldtags,$newtags)));?????
?
?? $result1=count(array_diff($newtags,$oldtags));//返回更新前后TAG的差值数?
?
? $result2=count(array_diff($oldtags,$newtags));//返回更新前后TAG的差值数
?
? if(($result1 !== $result2) || ($result !==0)){//2与原来的完全相同->过滤掉????????????
?
?? $array_intersect=array_intersect($oldtags,$newtags);//取得交值?
?
?? $oldtags_diff=array_diff($oldtags,$array_intersect);//原来的标签,被更新后已无用,需要删除的?
?
??? $newtags_diff=array_diff($newtags,$array_intersect);//修改的标签,需要添加的?
?
//删除或者count-1????
?
???? if(count($oldtags_diff) !==0){??
?
???? foreach ($oldtags_diff as $name) {?
?
???? $tagvo=$tag->where("module='$module' and name='$name'")->find();?
?
???? $count=intval($tagvo['count']);//获取标签的数量?
?
if($count==1){?
?
??? $tag->where('id='.$tagvo['id'])->delete();?
?
??? $tagged->where('tagId='.$tagvo['id'].' and recordId='.$recordId)->delete();?
?
?}elseif($count > 1){?
?? $tag->where('id='.$tagvo['id'])->setDec('count',1);//标签数量减1?
?
?? $tagged->where('tagId='.$tagvo['id'].' and recordId='.$recordId)->delete();//删除tagged中相关数据??
?}
? }
}?
//添加更新的标签???
?
if(count($newtags_diff) !==0){?
?
?? foreach ($newtags_diff as $v) {?
?
?????? $v = trim($v);??????????
?
?????? if (!emptyempty($v)) {?
?
??????? // 记录已经存在的标签?
?
???? $map['module'] = $module;?
?
??????? $map['name'] = $v;?
?
??????? $tagg = $tag->where($map)->find();?
?
?????? if ($tagg) {//如果现在保存的标签与之前相同的标签累加?
?
?????? $tagId = $tagg['id'];?
?
????????? $tag->where('id=' . $tagg["id"])->setInc('count',1);//count统计加1(这个函数有三个参数,默认加1)?
?
????????? } else {//如果是新添的标签,标签+1?
?
?????????????????? $t = array();?
?
?????????????????? $t["name"] = $v;?
?
?????????????????? $t["count"] = 1;?
?
?????????????????? $t["module"] = $module;?
?
?????????????????? $result = $tag->add($t);?
?
?????????????????? $tagId = $result;?
?
??????????? }?
????? }?
???????????????? //记录tag信息?
??? $t = array();?
?
????? $t["module"] = $module;?
?
????? $t["recordId"] = $recordId;//保存news的ID?
?
????? $t["tagTime"] = time();?
?
????? $t["tagId"] = $tagId;//保存tag的ID?
?
????? $tagged->add($t);?
?
???? }?
?
??? }??
???? }?
???? }?
???? }?
}

public? function update() {?
$Blog=D('Blog');?
$vo=$Blog->create();?
$this->updateTag($vo,'Blog');//更新前调用?
if (false === $vo) {?
?$this->error($Blog->getError());?
???? }?
?? // 更新数据?
?? $list = $Blog->save();?
?? if (false !== $list) {?
???? //print_r($list);?
??????
???? $this->success('编辑成功!');?
?? } else {?
?????? //错误提示?
?????? $this->error('编辑失败!');?
?? }?
}