邮政工作后如何重定向?

时间:2010-01-27 12:02:05

标签: php redirect-after-post

  

可能重复:
  Back button re-submit form data ($_POST)

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)

1 个答案:

答案 0 :(得分:0)

关于$_SERVER - 请参阅this