thinkphp条件查询和模糊查询的一些方法

#文章管理
    public function adminArticle(){
        $adminArticle=M("article");
        $arr_seach=$this->seach($adminArticle,10,"篇文章","now desc","");//参数格式seach($db,$num,$page_header,$order,$where)       
        ##按最早排序
        if(!@empty($_POST['time'])){
            $arr_seach=$this->seach($adminArticle,10,"篇文章","now asc","");
        }
        ##按作者查询
        if(!@empty($_POST['author'])){
            $arr_seach=$this->seach($adminArticle,10,"篇文章","now desc","author='{$_POST['author']}'");
        }
        ##按标签查询
        if(!@empty($_POST['classify'])){
            $arr_seach=$this->seach($adminArticle,10,"篇文章","now desc","classify='{$_POST['classify']}'");
        }
        ##模糊查询
        if(!@empty($_POST['seach'])){
            $map['title'] =array('like',"%{$_POST['seach']}%",'or');
            $arr_seach=$this->seach($adminArticle,10,"篇文章","now desc",$map);
        }
        ##输出到view
        $selectArticle=$arr_seach['selectArticle'];
        $show=$arr_seach['show'];
        $arr_index=array(
            "selectArticle"=>$selectArticle,
            "page"=>$show
            );
        $this->assign($arr_index);
        $this->display();
    }
    ##一个查询方法
    public function seach($db,$num,$page_header,$order,$where){
        $count = $db->where($where)->count();// 
        $Page       = new \Think\Page($count,$num);// 实例化分页类 传入总记录数和每页显示的记录数(25)
        if($page_header==false){
            $Page->setConfig("header","");
        }else{
            $Page->setConfig("header","<span class='rows'>共 %TOTAL_ROW% ".$page_header."</span>");
        }
        $show       = $Page->show();// 分页显示输出

        $selectArticle=$db->order($order)->where($where)->limit($Page->firstRow.','.$Page->listRows)->select();
        
        return $arr_page = array(
        "show"=>$show,
        "Page"=>$Page,
        "selectArticle"=>$selectArticle,
        );
    }