有些人建议我,而不是编辑问题,把它作为新问题,这就是为什么我这样做......
<?php
session_start();
if(isset($_POST['username']) && ($_POST['password']))
{
$con=mysql_connect("localhost","root","");
if(!$con)
{
die('Could Not Connect:'.mysql_error());
}
mysql_select_db("tcs",$con);
$usr=$_POST["username"]; //pick username from login page
$pwd=hash('sha1',$_POST['password']); //pick password from login page and use hash algorithm to encrypt it
$query="select * from employee where Username='$usr' and Password='$pwd'"; //serch that single row in which both r found
$result=mysql_query($query,$con);
if ($result)
{
$row=mysql_fetch_array($result);
if (($row["Username"]==$usr) && ($row["Password"]==$pwd))
{
$_SESSION['employee']['id']=$row['User Id'];
$_SESSION['employee']['username']=$row['Username'];
}
else
{
echo "Login Not Successfull";
}
}
}
else
{
echo 'Error! Username & Password were not sent!';
}
$_SESSION['user_authenticated'] = true;
?>
<html>
<body bgcolor="black">
<?php
if($_SESSION['user_authenticated'])
{
echo "<font color=red>"."<h3 align=center>"."Welcome ".$_SESSION['employee']['username']."</h3>"."</font>";
echo "<br />"."<a href='upload_file.php'>"."<font color='white'>"."<h4>"."Up-Load Files"."</h4>"."<font>"."</a>";
echo "<br />"."<br />"."<a href='list_files.php'>"."<font color='white'>"."<h4>"."List All Up-Loaded Files"."</h4>"."<font>"."</a>";
}
?>
</font>
<a href="logout_file.php"><font color="white"><h3 align="right">Sign Out</h3></font></a>
<font color="white">
</body>
</html>
好了,现在我明白了。但还有一个问题。假设我在登录行动页面上有一个退出的链接。当我点击退出按钮时,我被重新指示登录page.ok没有问题,但如果我再次按下后退按钮,我被要求重新发送数据(即使在退出后),我再次登录行动页面为什么如此。这是错误的yar ..做什么。对于所有其他页面,如果我点击上传的退出按钮 按钮 - &gt;重定向到登录,如果我按回按钮,则表示您已退出。我不知道如何检查signinaction的会话变量退出
正如费利克斯先生告诉我检查这个http://www.thefutureoftheweb.com/blog/get-redirect-after-post
但实际上我并没有得到这个家伙说的话。对不起,我不是那么机械,因为我是个乞丐我知道我面临的问题......
据我所知
if (count($_POST)) { //checking how many time data is being resend.
// process the POST data
add_comment($_POST); //what this function do i dont know
// redirect to the same page without the POST data
header("Location: ".$_SERVER['PHP_SELF']); //i think it is like
//refreshing without get input again from allpication form
die;
}
请解释一下,特别是这个$_server(;PHP_SELF)