Home Backend Development PHP Tutorial Example of client communication function code implemented by ThinkPHP combined with ajax and Mysql_PHP tutorial

Example of client communication function code implemented by ThinkPHP combined with ajax and Mysql_PHP tutorial

Jul 13, 2016 am 10:24 AM
ajax mysql thinkphp

This example uses ThinkPHP combined with Ajax and mysql to realize the client's communication function. The details are as follows:

1. Use the ajax partial refresh function of js. Each refresh will insert the new records read from the database into the display area of ​​the page. The code is as follows:

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window.onload =setInterval(showWords1000);//加载完成之后开始执行刷新功能

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function showWords()//刷新时被调用函数,实现ajax请求

  {

   xmlHttp=GetXmlHttpObject();//从自定义的函数中获取请求对象。

   if (xmlHttp==null)

   {

    alert ("Browser does not support HTTP Request")

    return;

   }

   var url="index.php?g=Ksks&m=Comments&a=refresh";//要请求的路径使用shuipfcms框架,所以g是分组,m是action控制器,a是模板

   url=url+"&data_id="+$("#data_id").val();//接上,data_id传的参数,用于查询数据库的id

   url=url+"&lasttime="+$("i").last().siblings('input').val();//lasttime是页面显示数据的最后一个记录的时间戳,查找时根据大于这个时间戳的条件查找

   xmlHttp.onreadystatechange=stateChanged;//响应状态改变时调用的函数

   xmlHttp.open("GET",url,true);//使用get方法提交

   xmlHttp.send();//上面传参之后,这句可要可不要

  }

  function stateChanged() //实现向页面插入数据功能

  {

  var str ="";

   if(xmlHttp.readyState==4 || xmlHttp.readyState=="complete")

   {

    eval("var arrs="+xmlHttp.responseText);//获取由action响应输出的数据,因为数据室php数组格式,需用eval或json转化成js数组格式

    var chdiv=$("#conversation_history");//通信聊天记录框

    for(var j=0;j<arrs.length;j++){//循环插入数据

       var obj=$("<tr><td><h3></h3></td><td></td></tr>");//定义页面当中记录框的html格式代码

   var i=$("<i>  "+arrs[j].times+"</i><input type='hidden' value='"+arrs[j].times+"'>");//i标签i为thinkphp定义的直接将时间输出到input隐藏并且存储得到数据里面的聊天发送时间

   var p=$("<p></p>");

   p.html(arrs[j].content);//聊天内容

   p.append(i);

   var h3value=arrs[j].name;//发送的作者

   obj.find("h3").html(h3value+":");

   if(h3value=="主持人")

   {obj.find("h3").addClass("presenter");}//主持人会特别显示

   obj.find("td:last").append(p);

       chdiv.append(obj);//追加到table里面

    }

    chdiv.parent().scrollTop(chdiv.parent()[0].scrollHeight+0);//滚动到底部

   }

  }

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function GetXmlHttpObject()//定义ajax请求对象

  {

   var xmlHttp=null;

   try

   {

    // Firefox, Opera 8.0+, Safari

    xmlHttp=new XMLHttpRequest();

   }

   catch (e)

   {

    //Internet Explorer

    try

    {

     xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");

    }

    catch (e)

    {

     xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");

    }

   }

   return xmlHttp;

  }

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2. Action controller, the code is as follows:

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function refresh(){

   $data_id = I('get.data_id');//获得嘉宾id

   $lasttime = I('get.lasttime');

   //print_r(date("Y-m-d H:i:s",$lasttime));

   if(!$data_id)

    $this->error("该访谈不存在!");

   $data = M("ksks_words_memoir");

    

   //print_r(date('Y-m-d H:i:s',$lasttime));

   if(!$data)

    $this->error("初始化数据失败!");

   //$words = $data->where(array('dataid' => $data_id))->order('time asc')->select();

   //print_r($data->where(array('time' => $lasttime))->select());

   $where['time'] = array('gt',$lasttime);

   $count = $data->where($where)->count();

   //print_r(date("Y-m-d H:i:s",$lasttime));

   $words = $data->where($where)->select();

   $datas = array();//要返回的数组

   $i = 0;

   foreach($words as $word)

   {

    $datas[$i]['name'] = $word['name'];

    $datas[$i]['content'] = $word['content'];

    $datas[$i]['times'] = date('Y-m-d H:i:s',$word['time']);

    $lasttime = $word['time'];

    $i = $i+1;

   }

   setCookie('lasttime',$lasttime);

   $datas = json_encode($datas);

   //$this->cache();

   echo $datas;

 }

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3. Chat page, the code is as follows:

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<volist name="words" id="vo">

<tr>

<td><h3 <if condition="$vo['name']=='主持人'">class="presenter"</if>>{$vo.name}:</h3></td>

<td>

<div>{$vo.content}<i>  {$vo.time|date="Y-m-d H:i:s",###}</i>

       <input type="hidden" name="time" value="{$vo.time}">

</div>

</td>

</tr>

</volist>

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