PHP code not re-directing

這段代碼有什麼問題...... ???它不是重定向到其他頁面，但留在login.php頁面（空白頁）...數據庫都是正確的... 有人可以幫助我在此代碼... 您的幫助是非常感謝...PHP code not re-directing

<? 
require_once('include/config.php'); 
require_once('include/functions.php'); 

session_start(); 

session_destroy(); 

$message=""; 


$Login=$_POST['Login']; 
if($Login){ // If clicked on Login button. 
$username=$_POST['username']; 
$md5_password=md5($_POST['password']); // Encrypt password with md5() function. 



mysql_select_db("$db", $con); 


$result=mysql_query("select * from staff where stf_username='$username' and stf_password='$md5_password'"); 
$sql =mysql_query("select stf_level from staff where stf_username='$username'"); 


if(mysql_num_rows($result)!='0'){ // If match. 
session_register("username"); 
while($row = mysql_fetch_array($sql)) 
{ 
//echo $row['level'] . " "; 
if($row['stf_level'] == 1){ 
header("location:admin/index.php"); 
} 
elseif($row['stf_level'] == 2){ 
header("location:cashier/index.php"); 
} 
elseif($row['stf_level'] == 3){ 
header("location:waiter/index.php"); 
} 
elseif($row['stf_level'] == 4){ 
header("location:kitchen/index.php"); 
} 
} 

//header("location:main.php"); // Re-direct to main.php 
exit; 
}else{ // If not match. 
$message="--- Incorrect Username or Password ---"; 
} 

} // End Login authorize check. 
?> 


<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 
<html xmlns="http://www.w3.org/1999/xhtml"> 

<head> 
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 

<meta http-equiv="imagetoolbar" content="no" /> 
<meta name="MSSmartTagsPreventParsing" content="true" /> 

<meta name="description" content="Description" /> 
<meta name="keywords" content="Keywords" /> 

<meta name="author" content="Aafrin" /> 


<title>iCafe Login</title> 
<link rel="stylesheet" type="text/css" href="style.css" /> 
<link rel="stylesheet" type="text/css" href="css/keyboard.css" /> 
<script type="text/javascript"  src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"></script> 
<script type="text/javascript" src="js/keyboard.js"></script> 

</head> 

<body> 
<div id="wrapper"> 

<div id="loginPanel"> 
<img class="image" alt="" src="images/logo.png" width="220" height="120" /> 
<div id="error"><? echo $message; ?></div> 

<form id="form" name="form" method="post" action="<? echo $PHP_SELF; ?>"> 

    <label>Username :</label> 
     <input type="text" name="username" class="keyboardInput" /> 

    <label>Password :</label> 
     <input type="password" name="password" class="keyboardInput" /> 

    <input name="Login" type="submit" id="Login" value="Login" class="submit" /> 
    <!--  
    <input type="submit" value="Submit" name="submit" class="submit" /> 
    --> 

</form> 

<div id="footer"> 
XYZ © 2012 - All Rights Reserver | Powered By <a  href="http://www.facebook.com/kesavans">Kesavan</a> 
</div> 

</div> 
<!-- 
<div id="details"> 
<p>Login Details</p> 
Admin : admin 
<br /> 
Waiter : waiter 
<br /> 
Kitchen : kitchen 
<br /> 
Cashier : cash 
</div> 
--> 
</body> 

</html>

來源

2014-02-28 user3364584

'出口（）;'後，你的頭 –

然後學會不要使用已棄用MySQL擴展，但切換到庫MySQLi或PDO預處理語句和綁定變量，瞭解SQL注入，得知MD5（）是完全如果您希望網站保持安全，則不適用於哈希密碼等 –

我想你應該把空間後：它會像

header("location: cashier/index.php");

來源

2014-02-28 11:46:15

嘗試@header("")可能是你有一個錯誤。爲什麼不把所有的位置保存在變量中，並將變量傳遞給頭部函數？

if($x=1){$loc="admin/index.php"} 
if($x=2){$loc="staff/index.php"} 
if($x=3){$loc="manager/index.php"} 
@header('location:$loc')

來源

2014-02-28 11:47:53

PHP code not re-directing

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