How to implement collection function in php

How to implement the collection function in PHP: first create the front-end code to implement the login interface; then implement the collection function through the if statement; and finally implement the collection processing function in the PHP background.

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php realizes the collection function

This is the database table

Without further ado, let’s talk about the code

Front desk

html part

      

        
收藏
      

php background processing

  // 商品收藏   1 代表未登入 2代表取消收藏  3 代表 收藏成功 
    public function collect_add(){
      if(empty(session('uid'))){
        echo '1';
      }else {
        $collect=M('collect');
        $gid=I('post.gid');
        //先確定是否已收藏
        $map['gid']=$gid;
        $map['uid']=session('uid');
        $data=$collect->where($map)->find();
        if($data){
          if($data['status']==1){
            $collect->where('id='.$data['id'])->setField('status',0);
            echo '2';
          }else{
            $collect->where('id='.$data['id'])->setField('status',1);
            echo '3';
          }
        }else{
          if($collect->create()){
            $collect->gid=$gid;
            $collect->create_time=get_date();
            $collect->uid=session('uid');
            $collect->status=1;
            $collect->add();
            echo '3';
          }else{
            echo '伺服器出錯，請重試!';
          }
        }
      }
    }

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