功能：用户发言页面
<?php
/**********************************/
/* 文件名：sendmsg.php */
/* 功能：用户发言页面 */
/**********************************/
include "config.inc.php"; //包含配置信息
include "header.inc.php"; //包含公用头部页面
//行为
$action = isset($_REQUEST['action']) ? $_REQUEST['action'] : 'public';
//私人聊天对象
$to = isset($_REQUEST['to']) ? $_REQUEST['to'] : '';
//发言者，当前用户名
$username = isset($_POST['username']) ? $_POST['username'] : $_SESSION['username'];
//发言信息
$message = isset($_POST['message']) ? $_POST['message'] : '';
if(!empty($message))
{
//检查用户是否存在
$query = "SELECT * from chatter_users WHERE username='$username'";
$result = @mysql_query ($query);
$num_rows = mysql_num_rows($result);
//如果用户存在
if($num_rows>0)
{
//更新用户在线时间，以防超时
$query = "UPDATE chatter_users SET time=NOW() WHERE username='$username'";
$result = @mysql_query ($query);
//增加留言记录
if($action=='private')
{
//增加私聊天记录
$query = "INSERT INTO chatter_privboard(time, fromname, toname, message)
VALUES (NOW(),'$username', '$to', '$message');";
$result = @mysql_query ($query);
}
else
{
//增加公共聊天记录
$query = "INSERT INTO chatter_chatboard(time, username, message)
VALUES (NOW(),'$username', '$message');";
$result = @mysql_query ($query);
}
}else{
echo "<script>parent.document.location.href='login.php'</script>";
die("非法操作！");
}
}
?>
<?php
if($action=="private"){ //“私聊”时的界面
?>
<form action="sendmsg.php?to=<?php=htmlentities(urlencode($to));?>&action=private"
method="POST" name="submitchat">
<input type="hidden" size="25" name="username"
value="<?php echo htmlspecialchars($username); ?>">
<input type="hidden" size="25" name="to"
value="<?php echo htmlspecialchars($to); ?>">
<input type="hidden" size="25" name="action"
value="private">
<table align="center">
<tr>
<td>消息：</td>
<td><input type="text" size="50" name="message" value=""></td>
<td><input type="submit" name="submit" value="发送" class="buttons"></td>
</tr>
</table>
</form>
<?php
}else{ //“公开”时的界面
?>
<form action="sendmsg.php?action=public" method="POST" name="submitchat">
<input type="hidden" size="25" name="action" value="public">
<table align="center">
<tr>
<td>用户名：</td>
<td>
<?php
//判断用户是否登录
if (!isset($_SESSION['username']))
{
?>
<input type="text" size="25" name="username" value="<?php echo $username; ?>">
<?php
}else{
?>
<b><?php echo $username; ?></b>
<input type="hidden" size="25" name="username" value="<?php echo $username; ?>">
<?php
}
?>
</td>
<td>消息：</td>
<td><input type="text" size="50" name="message" value=""></td>
<td><input type="submit" name="submit" value="发送" class="buttons"></td>
<td><a href="login.php?action=logout" target="_parent">改变用户/登出</a></td>
</tr>
</table>
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</form>
<?php } ?>
