site/application/index/controller/Base.php

<?php
namespace app\index\controller;
use think\Controller;

use think\Request;

class Base extends Controller//公共控制器
{ 


    protected function _initialize()
    {
        $column = $this->tops();//栏目信息
        $ta = $this->tags();//标签信息

        $this->assign([
            'column'=>$column,//栏目信息
            'ta'=>$ta,//标签信息
        ]);

        

    }

    protected function tops(){//头部栏目数据
        $co = db('column')->order('id asc')->select();
        return $co;
    }

    protected function tags(){//热门标签

        $tag = db('article')->field('id,keywords')->where('keywords','not null')->select();

        //***解决重复关键词(keywords)只显示其中的一个
        $qc=[];
        foreach ($tag as $ka){
            $key = explode(",",$ka['keywords']);
            foreach ($key as $k){
                $qc[]=$k;
            }
        }
        $tags = array_unique($qc);
        //_______________________________________________end
        return $tags;
    }


    public function search(){//热门标签搜索
        $keywords=input('keywords');
        if($keywords){
            $map['title']=['like','%'.$keywords.'%'];
            $ke['keywords']=['like','%'.$keywords.'%'];
            $searchres=db('article')->where($map)->whereOr($ke)->select();
            $this->assign(array(
                'searchres'=>$searchres,
                'keywords'=>$keywords,
            ));
        }else{
            echo  "<script>alert('非法请求!');location.href='".url('/index')."'</script>";
        }
        return view();

    }

    public function searchtop(){//头部关键词搜索
        if(request()->isPost()) {
//在top.html中的form表单下加一个隐藏域     <input type="hidden" name="TOKEN" value="{:session('TOKEN')}"
            //每次搜索时判断这个存入session的隐藏token值
            $post_token = input('post.TOKEN');//因为是提交方式是post所以就用post.name（TOKEN）来接收token传过来的值
            if(!checkToken($post_token)){//如果验证token不一致则提示请勿重复条件页面(token值在每次完成一个搜索时创建一个新的token)
//                $this->error('请不要重复提交页面',url('index/index/index'));
                echo  "<script>alert('请不要重复提交页面！');location.href='".url('/index')."'</script>";
            }
            $keywords = input('keywords');
            if($keywords){
                $map['title']=['like','%'.$keywords.'%'];
                $ke['keywords']=['like','%'.$keywords.'%'];
                $search=db('article')->where($map)->whereOr($ke)->select();
                if($search){
                    createToken();//搜索成功时创建一个新token
                    $this->assign(array(
                        'search'=>$search,
                        'keywords'=>$keywords,
                    ));
                }else{
                    createToken();//搜索失败时创建一个新token
                    $this->assign(array(
                        'search'=>null,
                        'keywords'=>'没有搜索到关键词!',
                    ));
                }
            }
        }else{
            echo  "<script>alert('非法请求');location.href='".url('/index')."'</script>";
        }
        return view();

    }
    

   
}