根据许多网友需求，特地把我站的这个模拟 OICQ 的在线聊天的东西献给大家！
1 用户必须注册登陆，在数据库 userinfo 里面保存如下几个字段
Name 不用问了，这是登陆用的用户名，必须唯一
Password 登陆密码
NickName 用户昵称，也就是显示的名字
Face 存放着用户头像的编号，比如 01，代表 /images/face/01.gif 头像文件
OnlineStatus 用户是否在线的标志，在用户登陆的时候设置为 1
CurrentDate 用户最后访问/更新的时间，用于判断用户是否在线
聊天纪录 forumtalk 的结构为
CREATE TABLE forumtalk (id int(11) NOT NULL auto_increment,sender varchar(20) NOT NULL,receiver varchar(20) NOT NULL,date int(11) DEFAULT '0' NOT NULL,readsign tinyint(4) DEFAULT '0' NOT NULL,body varchar(200) NOT NULL,PRIMARY KEY (id),UNIQUE id_2 (id),KEY id (id));
其中 sender 是发送人的 Name
receiver 是接受人的 Name
date 是发言的时间
readsign 发言是否已经阅读过
body 发言内容
2 显示在线用户的头像
<?$onlineresult = mysql_query("select Name,NickName,Face,EnterTimes from userinfo where OnlineStatus=1 and CurrentDate >".(date("U")-120));
$onlinenumber = mysql_num_rows($onlineresult);
echo "欢迎光临，共有:".$onlinenumber."位朋友在线，按头像发短信息:";
for($i=0;$i<$onlinenumber;$i++)
{if(!$onlineuser = mysql_fetch_array($onlineresult))
break;
echo "<a onClick=MM_openBrWindow('shortalk.php?talkto=".$onlineuser['Name']."','".$onlineuser['Name']."','width=300,height=250')>
<img src='images/face/".$onlineuser['Face'].".gif' width=20 height=20 ";if($name == $onlineuser['Name'])
echo "border=1 ";echo " title='代号:".$onlineuser['Name']."
昵称:".$onlineuser['NickName']."
来访:".$onlineuser['EnterTimes']."'></a>";}?>
其中的 onClick 用于弹出发送消息的对话窗口，大家可以在网页的源代码里面看到
3 在线用户的信息扫描和更新
在网页中使用内置框架来调用扫描和更新程序，这行也能在网页源代码里面看到?br
<iframe name=flush src="userflush.php" width="0" height="0" frameborder="0" scrolling="NO" marginwidth="0" marginheight="0" hspace="0" vspace="0"></iframe>
4 信息扫描和更新程序 userflush.php
<?session_start();
mysql_connect("localhost","","");
mysql_select_db("php2000");$delaytime=0;// 查找新的发言$query = "select * from forumtalk where readsign=0 and receiver='$name'";$result = mysql_query($query);if( mysql_num_rows($result) > 0){// 读取和显示弹出窗口$msg = mysql_fetch_array($result);$numberfriend = $msg['id'];echo "<script language=javascript>window.open('shortalk.php?action=view&talknumber=$numberfriend','_blank','width=300,height=250')</script>";}// 设置当前用户的最新时间标志，表示它在线mysql_query("update userinfo set currentdate=".date("U")." where name='$name'");// 设置刷新时间间隔为15秒echo "<meta http-equiv='refresh' content='15;url=userflush.php'>";?>
5 聊天信息的发送、阅读和回复程序 - shortalk.php
<?require("require.php"); // 判断用户是否合法在线的公用程序?><html><head><title>短信息</title><meta http-equiv="Content-Type" content="text/html; charset=gb2312"><style type="text/css">td {font-size:9pt}</style><script language="Javascript"><!--function docheck() {if (document.sendmsg.replymessage.value=="") {alert("缺少内容：需要输入您的留言内容");document.sendmsg.replymessage.focus();return(false);}return (true);}function MM_openBrWindow(theURL,winName,features) { //v2.0window.open(theURL,winName,features);}//--></script></head><body bgcolor="#DDDDFF"leftmargin="0" topmargin="0" background="phpchat_images/cloudtile.jpg"><?if($action == "view"){$tmp = mysql_fetch_array(mysql_query("select sender,body,date from forumtalk where id=$talknumber and receiver='$name'"));$msg = $tmp['body'];$message = ereg_replace("","",$msg);
mysql_query("update forumtalk set readsign=1 where id=$talknumber");$sendernickname = mysql_fetch_row(mysql_query("select nickname from userinfo where name='".$tmp['sender']."'"));?><table width="300" border="0" cellspacing="0" cellpadding="0" height="200" bgcolor="f0f0f0"><tr><td colspan="2" height="20" bgcolor="99cc99" align="center">查看短信息</td></tr><tr><td colspan="2" height="20"><?echo date("m月d日 h:i",$tmp['date'])." ".$sendernickname[0]?> 给你[<?echo $name?>]留言:</td></tr><form name=viewtalk action=shortalk.php method=post><input type=hidden name=talkto value=<?echo $tmp['sender']?>><input type=hidden name=action value=send><input type=hidden name=talknumber value=<?print($talknumber)?>><tr align="center"><td colspan="2" height="146" valign="top"><textarea name="textfield" cols="40" rows="11" readonly><?print($message)?></textarea></td></tr><tr><td colspan="2" align="center"><input type="submit" name="toreply" value="回复留言 Enter"><a href="http://cms.ddvip.com/index.php#" onClick="MM_openBrWindow('memberviewtalk.php?talkto=<?echo $tmp['sender']?>','viewtalk','scrollbars=yes')">聊天纪录</a> </td></tr></form></table><script language="Javascript">document.viewtalk.toreply.focus();</script><?}else if ($action == "sendbegin"){$replymessage = ereg_replace("
","",$replymessage);$replymessage = ereg_replace(">",">",$replymessage);$replymessage = ereg_replace("<","<",$replymessage);$replymessage = substr($replymessage,0,2000);mysql_query("insert into forumtalk (sender,receiver,body,date) values ('$name','$talkto','$replymessage',".date("U").")");print("<script language='javascript'>window.close()</script>");}else{?><table width="300" border="0" cellspacing="0" cellpadding="0" height="200" bgcolor="f0f0f0"><form name=sendmsg action=shortalk.php method=post OnSubmit=return(docheck());><input type=hidden name=action value=sendbegin><tr align="center"><td colspan="2" height="20" bgcolor="99cc99">发送短信息</td></tr><tr align="center"><td colspan="2" height="20">发言对象：<select name="talkto"><?$result = mysql_query("select name,nickname from userinfo where onlinestatus=1");while($msg=mysql_fetch_array($result)){if($msg['name']==$talkto)echo "<option value='".$msg['name']."' selected>".$msg['nickname']."</option>";
else echo "<option value='".$msg['name']."'>".$msg['nickname']."</option>
";}?></select>请短于500字符 </td></tr><tr align="center"><td colspan="2" height="146" valign="top"><textarea name="replymessage" cols="40" rows="9"></textarea></td></tr><tr align="center"><td colspan="4"><?if($talknumber != ""){print("<input type=button name=review value='查看前一留言 Alt+P' accesskey='p' onClick='javascript:history.go(-1)'>");}?><input type="submit" name="reply" value="开始新的发送留言 Alt+S" accesskey='s'><a href="http://cms.ddvip.com/index.php#" onClick="MM_openBrWindow('memberviewtalk.php?talkto=<?echo $talkto?>','viewtalk','scrollbars=yes')">聊天纪录</a></td></tr></form></table><script language="Javascript">document.sendmsg.replymessage.focus();</script><?}?></body></html>
