本文实例讲述了PHP+jquery+ajax实现即时聊天功能的方法。分享给大家供大家参考。具体如下：
这是一个简单的利用jquery与php做的一个聊天室的源码,我们这里定时利用ajax读取数据库并进行刷新了,下面直接参上源码,实例代码如下:
index.html页面如下：
复制代码 代码如下:
<!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=utf-8" />
<title>无标题文档</title>
<script src="js/jquery-1.9.1.min.js"></script>
<script>
var chat = {
init:function(){
chat.first();
$('#chat_btn').unbind('click').click(function(){
chat.send();
});
$('#my_chat').keyup(function(){
if(event.keyCode == 13){
chat.send();
}
});
},
first:function(){
$.getJSON('data.php',{
action:'first',
type:'l'
},function(data){
chat.btn_status._true();
$('#mwebtime').html(data.time);
$('#chat textarea').val(data.chat);
$('#chat textarea').stop(true,true).animate({scrollTop:9999}, 1);
chat.socket();
});
},
send:function(){
chat.btn_status._false();
$.getJSON('send.php',{
txt:$('#my_chat').val(),
type:'l'
},function(data){
if(data.status==200){
chat.btn_status._false();
$('#my_chat').val('');
setTimeout(function(){
chat.btn_status._true();
},2000);
}
});
},
socket:function(){
$.getJSON('data.php',{
action:'while',
type:'l'
},function(data){
$('#mwebtime').html(data.time);
$('#chat textarea').val(data.chat);
$('#chat textarea').stop(true,true).animate({scrollTop:9999}, 1);
chat.socket();
});
},
btn_status:{
_false:function(){
$('#chat_btn').html('等待').attr('disabled',true);
},
_true:function(){
$('#chat_btn').html('发言').attr('disabled',false);
}
}
}
chat.init();
</script>
</head>
<body>
<div id="chat">
<textarea wrap="physical" style="line-height:20px;font-size:12px;height:100px;width:200px;"></textarea>
<BR />
<input id="my_chat" type="text" />
<button id="chat_btn" disabled="disabled">发言</button>
</div>
<div id="mwebtime"></div>
</body>
</html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
<script src="js/jquery-1.9.1.min.js"></script>
<script>
var chat = {
init:function(){
chat.first();
$('#chat_btn').unbind('click').click(function(){
chat.send();
});
$('#my_chat').keyup(function(){
if(event.keyCode == 13){
chat.send();
}
});
},
first:function(){
$.getJSON('data.php',{
action:'first',
type:'l'
},function(data){
chat.btn_status._true();
$('#mwebtime').html(data.time);
$('#chat textarea').val(data.chat);
$('#chat textarea').stop(true,true).animate({scrollTop:9999}, 1);
chat.socket();
});
},
send:function(){
chat.btn_status._false();
$.getJSON('send.php',{
txt:$('#my_chat').val(),
type:'l'
},function(data){
if(data.status==200){
chat.btn_status._false();
$('#my_chat').val('');
setTimeout(function(){
chat.btn_status._true();
},2000);
}
});
},
socket:function(){
$.getJSON('data.php',{
action:'while',
type:'l'
},function(data){
$('#mwebtime').html(data.time);
$('#chat textarea').val(data.chat);
$('#chat textarea').stop(true,true).animate({scrollTop:9999}, 1);
chat.socket();
});
},
btn_status:{
_false:function(){
$('#chat_btn').html('等待').attr('disabled',true);
},
_true:function(){
$('#chat_btn').html('发言').attr('disabled',false);
}
}
}
chat.init();
</script>
</head>
<body>
<div id="chat">
<textarea wrap="physical" style="line-height:20px;font-size:12px;height:100px;width:200px;"></textarea>
<BR />
<input id="my_chat" type="text" />
<button id="chat_btn" disabled="disabled">发言</button>
</div>
<div id="mwebtime"></div>
</body>
</html>
data.php页面如下：
复制代码 代码如下:
<?php
header("Expires: Mon, 26 Jul 1997 05:00:00 GMT");
header("Last-Modified: ".gmdate("D, d M Y H:i:s")." GMT");
header("Cache-Control: no-cache, must-revalidate");
header("Pramga: no-cache");
set_time_limit(0);
$get = $_GET['action'];
$type = $_GET['type'];
$file = $type.'.txt';
if(isset($get) && isset($type) && file_exists($file)){
switch($get){
case 'first':
$chat = file_get_contents($file);
$json=array(
'status' => 200,
'time' => gmdate("s"),
'chat' => $chat,
);
echo json_encode($json);
break;
case 'while':
$oldsize = filesize($file);
$newsize = filesize($file);
while(true){
if($oldsize!=$newsize){
$chat = file_get_contents($file);
$json=array(
'status' => 200,
'time' => gmdate("s"),
'chat' => $chat,
);
echo json_encode($json);
exit;
}
clearstatcache();
$newsize = filesize($file);
usleep(10000);
}
break;
}
}
?>
header("Expires: Mon, 26 Jul 1997 05:00:00 GMT");
header("Last-Modified: ".gmdate("D, d M Y H:i:s")." GMT");
header("Cache-Control: no-cache, must-revalidate");
header("Pramga: no-cache");
set_time_limit(0);
$get = $_GET['action'];
$type = $_GET['type'];
$file = $type.'.txt';
if(isset($get) && isset($type) && file_exists($file)){
switch($get){
case 'first':
$chat = file_get_contents($file);
$json=array(
'status' => 200,
'time' => gmdate("s"),
'chat' => $chat,
);
echo json_encode($json);
break;
case 'while':
$oldsize = filesize($file);
$newsize = filesize($file);
while(true){
if($oldsize!=$newsize){
$chat = file_get_contents($file);
$json=array(
'status' => 200,
'time' => gmdate("s"),
'chat' => $chat,
);
echo json_encode($json);
exit;
}
clearstatcache();
$newsize = filesize($file);
usleep(10000);
}
break;
}
}
?>
send.php页面如下：
复制代码 代码如下:
<?php
$json = array();
$txt = isset($_GET['txt'])?$_GET['txt']:'';
$type = isset($_GET['type'])?$_GET['type']:'';
if($txt!=''){
$file = $type.".txt";
if(file_exists($file)){
$fp = fopen($file,"a");
$str = "rn".'Admin：'.$txt;
//$str = $txt."n"//linux;
fwrite($fp, $str);
fclose($fp);
$json['status']=200;
echo json_encode($json);
exit;
}
}
?>
$json = array();
$txt = isset($_GET['txt'])?$_GET['txt']:'';
$type = isset($_GET['type'])?$_GET['type']:'';
if($txt!=''){
$file = $type.".txt";
if(file_exists($file)){
$fp = fopen($file,"a");
$str = "rn".'Admin：'.$txt;
//$str = $txt."n"//linux;
fwrite($fp, $str);
fclose($fp);
$json['status']=200;
echo json_encode($json);
exit;
}
}
?>
希望本文所述对大家的php程序设计有所帮助。
