每当我尝试运行我的脚本时,出现此错误,并说我不太确定它为什么要这样做。我的目标是让它检查是否登录的客户端是管理员。mysql_num_rows():提供的参数不是有效的MySQL结果资源15
<?php
session_start();
$username = $_POST['username'];
$password = $_POST['password'];
if ($username&&$password)
{
$user = $_SESSION['user'];
//connect
$connect = mysql_connect("localhost","*******_robert","***********") or die ("Couldn't Connect"); //host,username,password
mysql_select_db("virtua15_gateway") or die ("Could not find database");
//query
$get = mysql_query("SELECT * FROM Users WHERE username='$user'");
$numrows = mysql_num_rows($query);
if ($numrows!=0)
{
while ($row = mysql_fetch_assoc($query))
{
$dbusername = $row['username'];
$dbpassword = $row['password'];
}
if ($username==$dbusername&&$password==$dbpassword)
{
header('Location: index2.php');
$_SESSION['username']=$dbusername;
}
else
echo "incorrect username and password";
}
else
die ("This user does not exist");
}
else
die("Please enter a username and a password");
while($get = mysql_fetch_assoc($get))
{
$admin = $row['admin'];
}
if ($admin==0)
die ("You are not and admin!");
header('Location: index2.php')
?>
我敢肯定,我已经看到了这样的问题... [提示:在右边的“相关”选项卡下检查问题---->] –
[mysql_num_rows():提供的参数不是val的可能重复id MySQL结果资源](http://stackoverflow.com/questions/3698740/mysql-num-rows-supplied-argument-is-not-a-valid-mysql-result-resource) – DCoder