Home >Backend Development >PHP Problem >How to write a chat in php website
How to write a chat in php website
- angryTomOriginal
- 2019-10-29 10:41:382705browse
How to write a chat in php website
We can use a variety of methods to implement web chat rooms, such as websocket, Or use a third-party chat service. Here is the simplest way to continuously refresh the page to obtain information.
Recommended learning: PHP video tutorial
1. Database establishment
create table chat ( chattime datetime, nick char(10), words char(150) );
login.php
<html> <head> <title>用户登录</title> <meta charset="utf-8"> </head> <body>请输入您的昵称<br> <form action="main.php" method="post" target="_self"> //点击登录后跳转到main.php，并将输入的数据用post的方式发送过去 <input type="text" name="nick" cols="20"> <input type="submit" value="登录"> </body> </html>
main.php
<?php session_start(); $_SESSION['nick'] = $_POST['nick']; //获取login.php发送过来的数据，也就是用户昵称，并将它保存在session中用于对用户进行跟踪 ?> <html> <frameset rows="80%, 20%"> <frame src="cdisplay.php" name="chatdisplay"/> // 聊天信息展示区 <frame src="speak.php" name="speak"/> //发言区 </frameset> </html>
speak.php
<html>
<head>
<title>发言</title>
<meta charset="utf-8">
</head>
<body>
<?php
session_start(); //如果设置北京时间，需要加上 date_default_timezone_set('PRC');
if ($_POST['words']) {
$conn = mysql_connect("127.0.0.1","root","******"); //连接数据库
mysql_select_db("yuema", $conn);
$time = date(y).date(m).date(d).date(h).date(i).date(s); //当前时间
$nick = $_SESSION['nick'];
$words = $_POST['words'];
$str = "insert into chat(chattime, nick, words) values('$time', '$nick', '$words');";
mysql_query($str, $conn); //将用户名，时间和发言内容进行插入
mysql_close($conn);
}
?>
<form action="speak.php" method="post" target="_self">
<input type="text" name="words" cols="20">
<input type="submit" value="发言">
</form>
</body>
</html>cdisplay.php
<html>
<head>
<title>显示用户发言</title>
<meta http-equiv="refresh" content="5;url=cdisplay.php"> //设置每隔5秒钟刷新一次
</head>
<body>
<?php
$conn = mysql_connect("127.0.0.1", "root", "******");
mysql_select_db("yuema", $conn);
$str = "select * from chat order by chattime;";
$result = mysql_query($str, $conn);
$rows = mysql_num_rows($result);
mysql_data_seek($result, $rows-15); //取最近插入的15条数据
if ($rows<15)
$l = $rows;
else
$l = 15;
for ($i = 1; $i <= $l; $i++) { //输出这15条数据
list($chattime, $nick, $words) = mysql_fetch_row($result);
echo $chattime;
echo " ".$nick." ";
echo $words;
echo "<br>";
}
?>
</body>
</html>Result display
2. Ajax acquisition, without refreshing the page
login.php
<html> <head> <title>用户登录</title> <meta charset="utf-8"> </head> <body>请输入您的昵称<br> <form action="main.php" method="post" target="_self"> //点击登录后跳转到main.php，并将输入的数据用post的方式发送过去 <input type="text" name="nick" cols="20"> <input type="submit" value="登录"> </body> </html>
main.php
<?php session_start(); $_SESSION['nick'] = $_POST['nick']; //获取login.php发送过来的数据，也就是用户昵称，并将它保存在session中用于对用户进行跟踪 ?> <html> <frameset rows="80%, 20%"> <frame src="cdisplay.php" name="chatdisplay"/> // 聊天信息展示区 <frame src="speak.php" name="speak"/> //发言区 </frameset> </html>
speak.php
<html>
<head>
<title>发言</title>
<meta charset="utf-8">
</head>
<body>
<?php
session_start(); //如果设置北京时间，需要加上 date_default_timezone_set('PRC');
if ($_POST['words']) {
$conn = mysql_connect("127.0.0.1","root","******"); //连接数据库
mysql_select_db("yuema", $conn);
$time = date(y).date(m).date(d).date(h).date(i).date(s); //当前时间
$nick = $_SESSION['nick'];
$words = $_POST['words'];
$str = "insert into chat(chattime, nick, words) values('$time', '$nick', '$words');";
mysql_query($str, $conn); //将用户名，时间和发言内容进行插入
mysql_close($conn);
}
?>
<form action="speak.php" method="post" target="_self">
<input type="text" name="words" cols="20">
<input type="submit" value="发言">
</form>
</body>
</html>cdisplay .php
<html>
<head>
<meta charset="utf-8">
<title>显示用户发言</title>
<script type="text/javascript" src="jquery.js"></script> //jquery库，jquery.js可以在网上下载
<script type="text/javascript">
setInterval('show()', 3000); // 设置自动刷新时间 3000毫秒也就是3秒钟
function show() {
$.ajax({
url:'server_get.php', //请求发送到server_get.php进行处理
type:'post',
dataType:'html',
error:function() {
alert('请求失败，请稍后再试');
},
success:function(msg) {
$('p').html(msg); //设置body中p标签的内容
}
});
}
</script>
</head>
<body>
<p></p>
</body>
</html>server_get.php
<?php
$conn = mysql_connect("127.0.0.1", "root", "******");
mysql_select_db("yuema", $conn);
$str = "select * from chat order by chattime;";
$result = mysql_query($str, $conn);
$rows = mysql_num_rows($result);
mysql_data_seek($result, $rows-15);
if ($rows < 15)
$l = $rows;
else
$l = 15;
$string = "";
for ($i = 1; $i <= $l; $i++) {
list($chattime, $nick, $words) = mysql_fetch_row($result);
$string.=$chattime;
$string.=" ";
$string.=$nick;
$string.=" ";
$string.=$words;
$string.="<br>";
}
echo $string;
?>The above is the detailed content of How to write a chat in php website. For more information, please follow other related articles on the PHP Chinese website!
Statement：
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Previous article：How to store php user information cacheNext article：How to store php user information cache