成功登錄頁面不重定向到新代碼在php代碼

Question

我創建登錄系統在php.when我填寫用戶名和密碼，會話啓動但頁面不重定向到profile.php我想登錄後，登錄頁面是刷新本身。但是當我手動刷新login.php然後重定向到profile.ph。 我登錄的代碼是：

if ($result->num_rows != 1) { 
    //echo "Invalid credentials...!"; 
    $message = "wrong credentials"; 
    echo "<script type='text/javascript'>alert('$message');</script>"; 
} else { 
    // Authenticated, set session variables 
    $user = $result->fetch_array(); 
    $_SESSION['user_id'] = $user['id']; 
    $_SESSION['username'] = $user['username']; 


    $message = "You have successfully logged in.."; 
    echo "<script type='text/javascript'>alert('$message');</script>"; 

    redirect_to("profile.php?id={$_SESSION['user_id']}"); 

} 

Answer 1

使用

redirect("profile.php?id={$_SESSION['user_id']}"); 

或

http_redirect("profile.php", array("id" => "$_SESSION['user_id']"), true, HTTP_REDIRECT_PERM); 

或

header("profile.php?id={$_SESSION['user_id']}"); 

一些有用的鏈接

1. header
2. http_redirect
3. How to make a redirect in PHP?

Answer 2

，請複製粘貼完整的代碼，否則嘗試用下面的行替換

redirect_to("profile.php?id={$_SESSION['user_id']}"); 

..

header("location:profile.php?id=".$_SESSION['user_id']); 

不要忘記在你的php代碼的頂部添加以下行。

ob_start(); 

Answer 3

<?php 
ob_start(); 
if (isset ($_POST ['submit'])) { 

    $email = $_POST ['email']; 
    $password = $_POST ['password']; 
    $sql = "SELECT * from users WHERE email='$email' AND password='$password' limit 1"; 
    $result = mysql_query ($sql); 
    $num = mysql_num_rows ($result); 
    if ($num > 0) { 
     while ($rows = mysql_fetch_array ($result)) { 

      $username = $rows ['username']; 
      $uid = $rows ['user_id']; 
     } 
     session_start(); 
     $_SESSION ['user_id'] = $user ['id']; 
     $_SESSION ['username'] = $user ['username']; 
     header ("location:profile.php?id=" . $_SESSION ['user_id']); 
    } else { 
     echo "<p><b>Error:</b> Invalid username/password combination</p>"; 
    } 
} 
?> 

，如果你正在處理你的登錄頁面這個PHP代碼本身，那麼請充分代碼的HTML。因爲自動刷新可能是html代碼本身的問題。

Answer 4

PHP標題重定向不要輸出後發送。而你在這裏

$message = "You have successfully logged in.."; 
echo "<script type='text/javascript'>alert('$message');</script>"; 

發送它根據您的意見，您的功能確實使用了頭重定向。

function redirect_to ($url) { header("Location: {$url}"); } 

由於上面解釋的原因，這將不起作用。

使用JavaScript重定向那裏。

echo "<script>location.href='profile.php?id={$_SESSION['user_id']}';</script>"; 

Answer 5

正如您對問題的評論所述，標題重定向必須是瀏覽器的第一件事。所以你需要刪除echo語句。

if ($result->num_rows != 1) { 
    //echo "Invalid credentials...!"; 
    $message = "wrong credentials"; 
    echo "<script type='text/javascript'>alert('$message');</script>"; 
} else { 
    // Authenticated, set session variables 
    $user = $result->fetch_array(); 
    $_SESSION['user_id'] = $user['id']; 
    $_SESSION['username'] = $user['username']; 

    redirect_to("profile.php?id={$_SESSION['user_id']}"); 
}