This article illustrates the real-time message push function implemented in PHP. Share with you for your reference, as follows:

! [](https://pic3.zhimg.com/80/v2-e1546c33fd97ef3f05b374e91ba45e72_720w.jpg)

Entry file index.html

<! < HTML> <head> <title> </title> <style>. 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;" </div> <div class="content_box" id="content_box"> margin: 0 auto;" > <select id="username" style="font-size: 20px;" > <option value="1" selected="selected">1</option> <option value="2">2</option> </select> <input type="text" style="font-size: 20px;" value="" id="send_text"> <button id="btn_send" style="font-size: 20px;" < p style=" max-width: 100%; clear: both; min-height: 1em; </button> </div> <div class="error_tip" id="error_tip" style="color: red; > < / div > < script > $(function () {/ / $(' # btn_send). Send a message click (function () {var send_text = $(' # send_text). Val (); If (send_text. Length < = 0) {$(' # error_tip). The HTML (' can't enter a null value); }else{ send(send_text); }}); / / press enter to send message $(' # send_text) on (' keyup ', function (e) {if (e.k eyCode = = 13) {$(' # btn_send). The trigger (" click "); }}); / / build a communication link $(' # btn_link). Click (function () {the connect (); var _this = $(this); _this.attr('disabled',true); _this.html(' connected '); }); }); / / build a communication link function function the connect () {$(' # content_box_title). The HTML ($(' # username). Val () + 'in the message window). $.ajax({ data:{'user':$('#username').val()}, url:'ajaxPush.PHP', type:'get', timeout:0, dataType:'json', success:function(data){ $('#content_box').append('<div class="require">'+data.msg+'</div>'); connect(); }}); Function massege {var user =$('#username').val(); $.getJSON('write.php',{'msg':massege,'user':user},function(data){ if(data.sf){ $('#content_box').append('<div class="send">'+massege+'</div>'); $('#send_text').val(''); }else{$('#error_tip').html(' Input save error! '); }}); } </script> </body> </html>Copy the code

Ajax handles the input write.php

<? php /** * Created by TXM. * Time: 2017/4/18 13:13 * function: */ $filename = dirname(__FILE__).'/data.txt'; $isread_file = dirname(__FILE__).'/isread.txt'; $user = dirname(__FILE__).'/user.txt'; File_put_contents ($filename,$_GET[' MSG ']); file_put_contents($isread_file,'0'); file_put_contents($user,$_GET['user']); echo json_encode(array('sf'=>true));Copy the code

Long polling pushes ajaxpush.php

<? php /** * Created by TXM. * Time: 2017/4/18 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); // Set the message to read and exit the loop. if($isread == '0' && $get_user == $user){ file_put_contents($isread_file,'1'); break; } sleep(1); } echo json_encode(array('msg'=>$msg));Copy the code

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