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PHP写的一个简易聊天室

PHP #聊天室2012-11-25 11:03

基本功能：能登陆，聊天，记录在线人数IP事件，能控制聊天的字体颜色，自动把转化聊天中网址为链接地址，能定制聊天室标题、广告信息等等。使用文本作为存储媒体，又兴趣可以参考代码，并且进行扩展。其实PHP作为快速开发的脚本语言是很棒的！

实现代码如下：

<?php
/**
* 简易聊天室
* 作者: heiyeluren <heiyeluren_at_163.com>
* URL: http://yige.org/php/
*/
error_reporting(7);
session_start();
header("ContentType:text/html;charset=gb2312");
define("SCRIPT", $_SERVER['SCRIPT_NAME']);
define("CHAT_NOTE", "./yige.org.chat.txt");
define("ONLINE_LIST", "./yige.org.online.txt");
define("REF_TIME", 5);
define("CHAT_NAME", "PHP聊天室");
define("AD_MSG", "今天是中国情人节, 祝大家情人节快乐!!");
//获取值
if (isset($_GET['action']) && !empty($_GET['action'])) {
$action = $_GET['action'];
}
//如果已经登陆那么直接跳到聊天界面
if (!isset($_GET['action']) && isset($_SESSION['username'])) {
header("location:".SCRIPT."?action=chat");
}
//登陆提示
if (!isset($_GET['action'])) 
{
if (!session_is_registered('username'))
{
   echo " <p><h3 align=center>[ ".CHAT_NAME." ] © 2012</h3></p>
    <p align=center>
    <form action=".SCRIPT."?action=login method=post>
    呢称: <input type=text size=25 maxlength=30 name=login_user>
    <input type=submit value=聊天>
    </form></p>
    ";
   exit;
}
}
//校验登陆
if ($action=='login')
{
if (isset($_POST['login_user']) && !empty($_POST['login_user'])) {
   $username = $_POST['login_user'];
} else {
   $username = "游客";
}
session_register('username');
save_online($username, get_client_ip());
header("location:".SCRIPT."?action=chat");
}
//开始聊天 http://yige.org
if ($action=="chat")
{
$online_sum = get_online_sum();
echo "<head><title>[ ".CHAT_NAME." ]</title></head><center><body bgcolor=#C4BFB9 style='font-size:12px;'>
    <div style='border:1px solid #999966; width:802px;height:450'><iframe src='".SCRIPT."?action=show' name=show_win width=800 height=450 scrolling=auto frameborder=0></iframe></div><br>
    <marquee width=70% scrollamount=2> ".AD_MSG." </marquee>   [当前在线：$online_sum]
    <iframe src='".SCRIPT."?action=say' name=say_win width=800 height=60 scrolling=no frameborder=0>
";
}
//说话界面
if ($action=="say")
{
echo "<head><title>[ ".CHAT_NAME." ]</title></head><center><body bgcolor=#C4BFB9 style='font-size:12px;'>
   <form action=".SCRIPT."?action=save method=post name=chat onSubmit='return check()'>
   [".$_SESSION['username']."]说:<input type=text size=80 maxlength=500 name=chatmsg style=' background-color:#99CC99; width:550px; height:22px; border:1px solid:#000000'>
   <select name=usercolor>
   <OPTION selected style='COLOR: #000000' value='000000'>默认颜色</OPTION>
   <OPTION style='COLOR: #000000' value='#000000'>黑色沉静</OPTION> 
   <option style='COLOR: #ff0000' value='#FF0000'>红色热情</option> 
   <option style='COLOR: #0000ff' value='#0000FF'>蓝色开朗</option> 
   <option style='COLOR: #ff00ff' value='#FF00FF'>桃色浪漫</option> 
   <option style='COLOR: #009900' value='#009900'>绿色青春</option> 
   <option style='COLOR: #009999' value='#009999'>青色清爽</option> 
   <option style='COLOR: #990099' value='#990099'>紫色拘谨</option> 
   <option style='COLOR: #990000' value='#990000'>暗夜兴奋</option> 
   <option style='COLOR: #000099' value='#000099'>深蓝忧郁</option> 
   <option style='COLOR: #999900' value='#999900'>卡其制服</option> 
   <option style='COLOR: #ff9900' value='#FF9900'>镏金岁月</option> 
   <option style='COLOR: #0099ff' value='#0099FF'>湖波荡漾</option> 
   <option style='COLOR: #9900ff' value='#9900FF'>发亮蓝紫</option> 
   <option style='COLOR: #ff0099' value='#FF0099'>爱的暗示</option> 
   <option style='COLOR: #006600' value='#006600'>墨绿深沉</option> 
   <option style='COLOR: #333333' value='#333333'>灰色轨迹</option> 
   <option style='COLOR: #999999' value='#999999'>伦敦灰雾</option> 
   </select>
   <input type=submit value='说话' style='background-color:#ffffff'> <a href=".SCRIPT."?action=logoff title=退出聊天室 target=_top onclick='return confirm(\"你确定要退出聊天室吗?\")'>退出</a>
   </form>
   <script>function check(){if(document.chat.chatmsg.value==''){;alert('请输入聊天信息!');return false;}return true;}</script>
   ";
}
//保存说话
if ($action=="save")
{
if ($_POST['chatmsg']!="") {
   save_chat($_POST['chatmsg'], $_SESSION['username'], $_POST['usercolor']);
}
header("location:".SCRIPT."?action=say");
}
//显示聊天记录
if ($action=="show")
{
echo "<body style='font-size:12px' onload='scrollit()'>";
echo "<META HTTP-EQUIV=REFRESH CONTENT='".REF_TIME.";URL=".SCRIPT."?action=show'>";
if (file_exists(CHAT_NOTE)) {
   $chat_msg = @file_get_contents(CHAT_NOTE);
   echo $chat_msg;
} else {
   echo "目前没有人说话";
}
}
//退出聊天室
if ($action=="logoff")
{
unset($_SESSION['username']);
session_destroy();
header("location:".SCRIPT);
}
/* 基本函数 */
//保存聊天记录函数
function save_chat($msg, $user, $color)
{
if (!$fp = fopen(CHAT_NOTE, "a+")) {
   die('创建聊天记录文件失败, 请检查是否有权限.');
}
$msg = htmlspecialchars($msg);
$msg = preg_replace('/([http|ftp:\/\/])*([a-zA-])+\.([a-zA-Z0-9_-])+\.([a-zA-Z0-9_-])+(a-zA-Z0-9_)*/', '<a href=\\0 target=_blank>\\0</a>', $msg);
$msg = preg_replace('/([a-zA-Z0-9_\.])+@([a-zA-Z0-9-])+\.([a-zA-Z0-9-]{2,4})+/', '<a href=mailto:\\0>\\0</a>', $msg);
$msg = date('H:i:s')." [".$user."]说: <font color='".$color."'>".$msg."</font><br>\r\n";
if (!fwrite($fp, $msg)) {
   die('写入聊天记录失败.');
}
fclose($fp);
}
//写在线人信息
function save_online($user, $ip)
{
if (!$fp = fopen(ONLINE_LIST, "a+")) {
   die("创建在线列表文件失败, 请检查是否有权限.");
}
$user = str_replace("|", "", $user);
$line = $user."|".$ip."|".time()."\r\n";
if (!fwrite($fp, $line)) {
   die("写入在线列表失败.");
}
fclose($fp);
}
//获取在线人数
function get_online_sum()
{
if (file_exists(ONLINE_LIST)) {
   $online_msg = file(ONLINE_LIST);
   return count($online_msg);
} else {
   return 0;
}
}
//获取当前登陆用户IP
function get_client_ip()
{
if ($_SERVER['REMOTE_ADDR']) {
   $cip = $_SERVER['REMOTE_ADDR'];
} elseif (getenv("REMOTE_ADDR")) {
   $cip = getenv("REMOTE_ADDR");
} elseif (getenv("HTTP_CLIENT_IP")) {
   $cip = getenv("HTTP_CLIENT_IP");
} else {
   $cip = "unknown";
}
return $cip;
}
?>

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