说点废话：今天lol的时候 碰到一个坑货，技术确实不错，到后面，被我说了一句，那家伙居然说让我求他，他就玩。我骂了他一句傻逼。我就挂机，看着他们输了。有时候，看到别人要坑，我就先下手为强!
思路：sqlite:数据库数据，用来保存聊天记录；php链接数据库，接受ajax传送数据，返回处理结果；ajax异步获取聊天数据，异步更新聊天记录；
所用的数据库类，请参照前面blog。
一.登录
<?php session_start(); ?>
<!DOCTYPE html>
<html lang="zh-cn">
<head>
<meta charset='utf-8'>
<link href="http://cdn.bootcss.com/bootstrap/3.3.2/css/bootstrap.min.css" rel="stylesheet">
<!-- HTML5 shim and Respond.js for IE8 support of HTML5 elements and media queries -->
<!--[if lt IE 9]>
<script src="http://cdn.bootcss.com/html5shiv/3.7.2/html5shiv.min.js"></script>
<script src="http://cdn.bootcss.com/respond.js/1.4.2/respond.min.js"></script>
<![endif]-->
</head>
<style>
.main{
width: 500px;
margin: 50px auto;
}
.info-list{
border: 1px solid #dedede;
height: 200px;
overflow-y: scroll;
}
.info-list li{
border: 0px;
}
</style>
<body onload="cycle();">
<script>
var xmlhttp;
var a;
//生成xmlhttp对象
function create(){
if(window.XMLHttpRequest)
{
xmlhttp=new XMLHttpRequest();
}else{
xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}
}
//回调方法
function callback(){
if(xmlhttp.readyState==4&&xmlhttp.status==200)
{
document.getElementById("info_list").innerHTML=xmlhttp.responseText;//获取php获取到的聊天记录
}
}
//启动
function run(){
create();
xmlhttp.open("GET","/message/first.php",true);
xmlhttp.onreadystatechange=callback;
xmlhttp.send();
}
每隔500毫秒，便更新一次表中数据。
function cycle(){
setInterval("run()",500);
}
</script>
<div class="main">
<div class="panel panel-default">
<div class="panel-heading">登录</div>
<div class="panel-body">
<form method="POST" action="">
<div class="form-group">
<label for="exampleInputEmail1">账号</label>
<input type="text" name="username" class="form-control" id="exampleInputEmail1" placeholder="Enter email">
</div>
<div class="form-group">
<label for="exampleInputPassword1">密码</label>
<input type="password" name="password" class="form-control" id="exampleInputPassword1" placeholder="Password">
</div>
<input type="submit" name="submit" class="btn btn-default" value="登录">
<a type="button" class="btn btn-default" href="/message/register.php">注册</a>
</form>
</div>
</div>
</div>
<?php
if($_POST['submit']){//登录，并且获取session
include '../sqlite/sqlite_db.php';
$db=new SqliteDb();
$res=$db->query('user',' where username="'.$_POST['username'].'" and password="'.$_POST['password'].'"');
if ($res) {
foreach ($res as $key => $row) {
$_SESSION['user']['username']=$row['username'];
$_SESSION['user']['nickname']=$row['nickname'];
}
echo '<script>window.location.href="/message/";</script>';
}
}
?>
<script src="my.js"></script> <script src="http://cdn.bootcss.com/jquery/1.11.2/jquery.min.js"></script> <script src="http://cdn.bootcss.com/bootstrap/3.3.2/js/bootstrap.min.js"></script> </body> </html>
sqlite+php+ajax 即时聊天系统（ajax 长连接）一
原文：http://blog.csdn.net/youmypig/article/details/43653981