PHP jquery ajax实现即时聊天功能
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
<!DOCTYPE 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="http://code.jquery.com/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();
}
});
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},
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
<?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;
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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
<?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;
}
}本文地址：http://www.phprm.com/develop/fs5924.html
转载随意，但请附上文章地址:-)