PHP程序百行代码快速构建简易聊天室方法
<p >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。<p ><p >其实PHP作为快速开发的脚本语言是很棒的！<p ><p >===代码===<p ><p ><CENTER><ccid_nobr><table width="400" border="1" cellspacing="0" cellpadding="2"bordercolorlight = "black" bordercolordark = "#FFFFFF" align="center"><tr><td bgcolor="e6e6e6" class="code" ><pre><ccid_code><?php/** * 黑夜路人简易聊天室 * 作者: heiyeluren <heiyeluren_at_163.com> * 创建: 2005-8-10 22:42 * 修改: 2005-8-11 23:25 */error_reporting(7);session_start();header("ContentType:text/html;charset=gb2312");define("SCRIPT", $_SERVER['SCRIPT_NAME']);define("CHAT_NOTE", "./chat.txt");define("ONLINE_LIST", "./online.txt");define("REF_TIME", 5);define("CHAT_NAME", "黑夜路人聊天室");define("AD_MSG", "今天是中国情人节, 祝大家情人节快乐!!");//获取值if (isset($_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." ] &copy; 2005</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($username, get_client_ip()); header("location:".SCRIPT."?action=chat");}//开始聊天www.knowsky.comif ($action=="chat"){ $online_sum = get_online_sum(); echo "<head><title>[ ".CHAT_NAME." ]</title></head><center><body bgcolor=#C4BFB9 style='font-size:12px;'> <div style='border:1px solid #999966; width:802px;height:450'><iframe src='".SCRIPT."?action=show'name=show_win width=800 height=450 scrolling=auto frameborder=0></iframe></div><br> <marquee width=70% scrollamount=2> ".AD_MSG." </marquee>&nbsp;&nbsp; [当前在线：$online_sum] <iframe src='".SCRIPT."?action=say' name=say_win width=800height=60 scrolling=no frameborder=0> ";}//说话界面if ($action=="say"){ echo "<head><title>[ ".CHAT_NAME." ]</title></head><center><body bgcolor=#C4BFB9 style='font-size:12px;'><form action=".SCRIPT."?action=save method=post name=chatonSubmit='return check()'>[".$_SESSION['username']."]说:<input type=text size=80maxlength=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('/()*()+\.()+\.()+(a-zA-Z0-9_)*/', '<a href=\\0 target=_blank>\\0</a>', $msg); $msg = preg_replace('/()+@()+\.({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IPfunction 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;}?></ccid_code></pre></td></tr></table></ccid_nobr></CENTER><p ><p >（责任编辑：董建伟） <p align="center"></p></p>
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