功能：清空聊天记录页面
<?php
/**************************************/
/* 文件名：clearmsg.php */
/* 功能：清空聊天记录页面 */
/**************************************/
include "config.inc.php"; //包含配置信息
include "header.inc.php"; //包含公用头部页面
//用户名
$username = $_SESSION['username'];
//行为
$action = $_GET['action'];
if($action == "private")
{
//删除用户的私有聊天记录
//将发送者为$username的记录设置删除标记
$query = "UPDATE chatter_privboard SET delfrom = 1
WHERE fromname = '$username'";
$result = @mysql_query ($query);
//将接受者为$username的记录设置删除标记
$query = "UPDATE chatter_privboard SET delto = 1
WHERE toname = '$username'";
$result = @mysql_query ($query);
ExitMessage("全部私聊信息清除成功！", "action.php");
}
elseif($action == "all")
{
//查询管理员
$query = "SELECT * FROM chatter_users
WHERE username = '$username' AND isadmin = 1";
$result = mysql_query ($query);
//判断是否为管理员
$num_rows = mysql_num_rows($result);
$isadmin = ($num_rows > 0) ? true : false;
if($isadmin)
{
//清空公共聊天记录
$query = "TRUNCATE TABLE chatter_chatboard";
$result = @mysql_query ($query);
//清空私有聊天记录
$query = "TRUNCATE TABLE chatter_privboard";
$result = @mysql_query ($query);
ExitMessage("全部信息清除成功！", "action.php");
}
else
{
ExitMessage("只有管理员可以清除全部聊天记录！", "");
}
}
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?>
