PHP+mysql+ajax轻量级聊天室实例(兼容Chrome和IE)

2024-05-04 23:06:30

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ajax聊天室就是定时不定的刷新框架页面了,下面来给各位整理了一个PHP+mysql+ajax轻量级聊天室实例(兼容Chrome和IE)的例子,希望对大家有帮助.

做了一个QQ聊天交友网站,想加个聊天的功能,于是做完用PHP做了简单又强大的聊天室.

1.创建mysql数据库表:create table chat( id bigint AUTO_INCREMENT,username varchar(20),chatdate datetime,msg varchar(500),primary key(id));

2.编写建议连接数据库函数:dbconnect.php

<?php

function db_connect()

{

  date_default_timezone_set("Asia/Shanghai");

  $link = mysql_connect("xxx.xxx.xxx.xxx", "databasename", "password")

            or die('无法连接: ' . mysql_error());

  mysql_select_db("databasename") or die('没有你找到指定数据库');

  return true;

}

function quote($strText)

{

    $Mstr = addslashes($strText);

    return "'" . $Mstr . "'";

}

function isdate($d)

{

   $ret = true;

   try

   {

       $x = date("d",$d);

   }

   catch (Exception $e)

   {

       $ret = false;

   }

   echo $x;

   return $ret;

}

?>

3.编写ajax发送和接收函数:ajax发送函数chat_send_ajax.php

<?php

     require_once('dbconnect.php');

     db_connect();  //开源软件:Vevb.com

     $msg = iconv("UTF-8","GB2312",$_GET["msg"]);

     $dt = date("Y-m-d H:i:s");

     $user = iconv("UTF-8","GB2312",$_GET["name"]);

     $sql="INSERT INTO chat(USERNAME,CHATDATE,MSG) " .

          "values(" . quote($user) . "," . quote($dt) . "," . quote($msg) . ");";

          echo $sql;

     $result = mysql_query($sql);

     if(!$result)

     {

        throw new Exception('Query failed: ' . mysql_error());

        exit();

     }

?>

ajax接收函数chat_recv_ajax.php:

<?php

header("Content-Type:text/html;charset=gb2312");

header("Expires: Thu, 01 Jan 1970 00:00:01 GMT");

   header("Cache-Control: no-cache, must-revalidate");

   header("Pragma: no-cache");

     require_once('dbconnect.php');

     db_connect();



     $sql = "SELECT *, date_format(chatdate,'%Y年%m月%d日 %r') as cdt from chat order by ID desc limit 200";

     $sql = "SELECT * FROM (" . $sql . ") as ch order by ID";

     $result = mysql_query($sql) or die('Query failed: ' . mysql_error());



     // Update Row Information

     $msg="<table border='0' style='font-size: 10pt; color: white; font-family: verdana, arial;'>";

     while ($line = mysql_fetch_array($result, MYSQL_ASSOC))

     {

           $msg = $msg . "<tr><td>" . $line["cdt"] . " </td>" .

                "<td>" . $line["username"] . ": </td>" .

                "<td>" . $line["msg"] . "</td></tr>";

     }

     $msg=$msg . "</table>";



     echo $msg;

?>

4.聊天室页面:chat.html

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >

<head>

<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />

    <title>聊天页面</title>



<script type="text/javascript">

var t = setInterval(function(){get_chat_msg()},5000);

//

// General Ajax Call

//



var oxmlHttp;

var oxmlHttpSend;



function get_chat_msg()

{

    if(typeof XMLHttpRequest != "undefined")

    {

        oxmlHttp = new XMLHttpRequest();

    }

    else if (window.ActiveXObject)

    {

       oxmlHttp = new ActiveXObject("Microsoft.XMLHttp");

    }

    if(oxmlHttp == null)

    {

        alert("浏览器不支持XML Http Request！");

       return;

    }



    oxmlHttp.onreadystatechange = get_chat_msg_result;

    oxmlHttp.open("GET",encodeURI("chat_recv_ajax.php"),true);

    oxmlHttp.send(null);

}



function get_chat_msg_result()

{

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

    {

        if (document.getElementById("DIV_CHAT") != null)

        {

            document.getElementById("DIV_CHAT").innerHTML =  oxmlHttp.responseText;

            oxmlHttp = null;

        }

        var scrollDiv = document.getElementById("DIV_CHAT");

        scrollDivscrollDiv.scrollTop = scrollDiv.scrollHeight;

    }

}



function set_chat_msg()

{

    if(typeof XMLHttpRequest != "undefined")

    {

        oxmlHttpSend = new XMLHttpRequest();

    }

    else if (window.ActiveXObject)

    {

       oxmlHttpSend = new ActiveXObject("Microsoft.XMLHttp");

    }

    if(oxmlHttpSend == null)

    {

       alert("浏览器不支持XML Http Request！");

       return;

    }



    var url = "chat_send_ajax.php";

    var strname="noname";

    var strmsg="";

    if (document.getElementById("txtname") != null)

    {

        strname = document.getElementById("txtname").value;

        document.getElementById("txtname").readOnly=true;

    }

    if (document.getElementById("txtmsg") != null)

    {

        strmsg = document.getElementById("txtmsg").value;

        document.getElementById("txtmsg").value = "";

    }



    url += "?name=" + strname + "&msg=" + strmsg;

    oxmlHttpSend.open("GET",encodeURI(url),true);

    oxmlHttpSend.send(null);

}

function clickBtn(e)

  {

   if(window.event.keyCode==13)

   {

    var id=e.id;

    switch(id)

    {

     case "txtmsg":

      document.getElementById("Submit2").click();

      window.event.returnValue=false;

      break;

     }

   }

}

function fRandomBy(under, over){

switch(arguments.length){

case 1: return parseInt(Math.random()*under+1);

case 2: return parseInt(Math.random()*(over-under+1) + under);

default: return 0;

}

}

function SetTxtName(){

var i=fRandomBy(10);

if(i==0)document.getElementById('txtname').value='无敌战神';

if(i==1)document.getElementById('txtname').value='令狐冲';

if(i==2)document.getElementById('txtname').value='西门吹雪';

if(i==3)document.getElementById('txtname').value='超级玛丽';

if(i==4)document.getElementById('txtname').value='奥巴马';

if(i==5)document.getElementById('txtname').value='恐怖分子';

if(i==6)document.getElementById('txtname').value='聊斋奇女子';

if(i==7)document.getElementById('txtname').value='天朝?潘?;

if(i==8)document.getElementById('txtname').value='中500万了';

if(i==9)document.getElementById('txtname').value='神级奇葩';

if(i==10)document.getElementById('txtname').value='爱你不是两三天';

}

</script>

</head>

<body onload="SetTxtName();">



    <div style="border-right: black thin solid; border-top: black thin solid;

        border-left: black thin solid; border-bottom: black thin solid;

        background:#fff url('http://www.ihaonet.com/chat/blue.jpg') repeat-x left top;

        height: 450px;width: 500px; ">

        <table style="width:100%; height:100%">

            <tr>

                <td colspan="2" style="font-weight: bold; font-size: 16pt; color: white; font-family: verdana, arial;

                    text-align: center">

                    聊天窗口--全球最大QQ聊天交友网站</td>

            </tr>

            <tr>

                <td colspan="2" style="font-weight: bold; font-size: 16pt; color: white; font-family: verdana, arial;

                    text-align: left">

                    <table style="font-size: 12pt; color: white; font-family: Verdana, Arial;border: white thin solid; ">

                        <tr>

                            <td style="width: 100px">

                                名字:</td>

                            <td style="width: 100px"><input id="txtname" style="width: 150px" type="text" name="name" maxlength="15" value="匿名" /></td>

                        </tr>

                    </table>

                </td>

            </tr>

            <tr>

                <td style="vertical-align: middle;" valign="middle" colspan="2">

                    <div style="width: 480px; height: 300px; border-right: white thin solid; border-top: white thin solid; font-size: 10pt; border-left: white thin solid; border-bottom: white thin solid; font-family: verdana, arial; overflow:scroll; text-align: left;" id="DIV_CHAT">

                    </div>

                </td>

            </tr>

            <tr>

                <td style="width: 310px">

                    <input id="txtmsg" style="width: 350px" type="text" name="msg" onkeydown="return clickBtn(this)"/></td>

                <td style="width: 85px">

                    <input id="Submit2" style="font-family: verdana, arial" type="button" value="发送" onclick="set_chat_msg()"/></td>

            </tr>

            <tr>

                <td colspan="1" style="font-family: verdana, arial; text-align: center; width: 350px;">

                    </td>

                <td colspan="1" style="width: 85px; font-family: verdana, arial; text-align: center">

                </td>

            </tr>

        </table>

    </div>

</body>

</html>