php 简单消息推送(含源码)

我的代码

入口代码 index.html


<html>
<head>
    <title>反ajax推送title>
    <style>
        .send{color:#555;text-align: left;}
        .require{color:blue;text-align: right;}
        .content_box{text-align: center;margin: 20px;
                    border: 1px solid #ddd;padding: 20px;}
    style>
    <script src="http://code.jquery.com/jquery-1.11.2.min.js">script>
head>
<body>
    <div class="content_box" id="content_box_title" style="border: none;">消息框div>
    <div class="content_box" id="content_box">
    div>
    <div style="width: 450px;margin: 0 auto;">
        <select id="username" style="font-size: 20px;">
            <option value="1" selected="selected">1option>
            <option value="2">2option>
        select>
        <input type="text" style="font-size: 20px;" value="" id="send_text">
        <button id="btn_send" style="font-size: 20px;">发送button>
        <button id="btn_link" style="font-size: 20px">连接button>
    div>
    <div class="error_tip" id="error_tip" style="color: red;">
    div>
    <script>
        $(function(){
            //发送消息
            $('#btn_send').click(function(){
                var send_text = $('#send_text').val();
                if(send_text.length <= 0){
                    $('#error_tip').html('不能输入空值');
                }else{
                    send(send_text);
                }
            });
            //按回车键发送消息
            $('#send_text').on('keyup',function(e){
                if(e.keyCode == 13){
                    $('#btn_send').trigger('click');
                }
            });
            //建立通讯链接
            $('#btn_link').click(function(){
                connect();
                var _this = $(this);
                _this.attr('disabled',true);
                _this.html('已连接');
            });

        });
        //建立通讯连接函数
        function connect(){
            $('#content_box_title').html($('#username').val()+'的消息窗口');
            $.ajax({
                data:{'user':$('#username').val()},
                url:'ajaxPush.php',
                type:'get',
                timeout:0,
                dataType:'json',
                success:function(data){
                    $('#content_box').append('
'+data.msg+'
'
); connect(); } }); } //发送消息函数 function send(massege){ var user =$('#username').val(); $.getJSON('write.php',{'msg':massege,'user':user},function(data){ if(data.sf){ $('#content_box').append('
'+massege+'
'
); $('#send_text').val(''); }else{ $('#error_tip').html('输入保存错误!'); } }); }
script> body> html>

ajax处理输入 write.php


/**
 * Created by TXM.
 * Time: 2015/4/18 13:13
 * function:
 */

$filename  = dirname(__FILE__).'/data.txt';
$isread_file = dirname(__FILE__).'/isread.txt';
$user = dirname(__FILE__).'/user.txt';

//写入消息,消息未读,谁发送的消息
file_put_contents($filename,$_GET['msg']);
file_put_contents($isread_file,'0');
file_put_contents($user,$_GET['user']);

echo json_encode(array('sf'=>true));

长轮询推送 ajaxPush.php


/**
 * Created by TXM.
 * Time: 2015/4/18 13:12
 * function:
 */
$filename  = dirname(__FILE__).'/data.txt';
$isread_file = dirname(__FILE__).'/isread.txt';
$userfile = dirname(__FILE__).'/user.txt';
$get_user = $_GET['user'] == '1'?'2':'1';
$msg='';

while(1){
    $msg = file_get_contents($filename);
    $isread = file_get_contents($isread_file);
    $user = file_get_contents($userfile);

    //是对方发送的消息,设置消息已读,退出循环。
    if($isread == '0' && $get_user == $user){
        file_put_contents($isread_file,'1');
        break;
    }
    sleep(1);
}

echo json_encode(array('msg'=>$msg));

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