Question

我在提交表单后看了很多回复重定向到另一个页面，但到目前为止还没能让它工作，可能是因为我不知道在哪里实际放置代码。有人可以帮忙吗？其余的代码工作正常，我只需要知道在哪里放置header（）：

<?php
session_start();

$username = $_POST['username'];
$password = $_POST['password'];


//connects to database, checks username & password against database to see is user exists
if($username && $password)
{
include ("connect.php");

$query = mysql_query("SELECT * FROM users WHERE username='$username'");
$numrows = mysql_num_rows($query);

if($numrows !==0)
  {
   while($row = mysql_fetch_assoc($query))
   {
       $dbusername = $row['username'];
       $dbpassword = $row['password'];
   }
   //if username and password are correct
   if($username==$dbusername&&md5($password)==$dbpassword)
   {
       echo "You are logged in. <a href='main.php'>Continue to site.</a>";
       $_SESSION['username'] = $username;
   }
   //if password is incorrect
   else
        echo "Your password is incorrect.";
   }
   //if username is incorrect
   else
        die("Username does not exist.");
  }
  //if no information is submitted
  else
        die("Please enter your login details.");

//prevents errors from displaying on page
error_reporting(0);
?>

我还需要知道这个页面的位置：

<?php
//Check if register button was pressed
$button = $_POST['button'];

//if button was pressed,
if ($button)
{
//get data from form,
$username = $_POST['username'];
$password = $_POST['password'];
$retype_password = $_POST['retype_password'];
$first_name = $_POST['first_name'];
$last_name = $_POST['last_name'];
}

//check if all information has been entered,
if ($username && $password && $retype_password && $first_name && $last_name)
{
//check if password and retype_password are the same
if($password==$retype_password)
{
    //check if username already exists
    include("connect.php");

    $query = mysql_query("SELECT * FROM users WHERE username = '$username'");
    $numrows = mysql_num_rows($query);
    if($numrows == 0)
    {
        //encrypt password
        $password = md5($password);

        //sends data from form to database - creates new user
        $register = mysql_query("INSERT INTO users VALUES ('', '$username', '$password',       '$first_name', '$last_name')");

        echo "You are now registered. <a href='main.php'>Continue to site.</a>";
    }
    else
        echo "Username is unavailable.";
}
else
    echo "Password did not match.";         
}

//prevents errors from displaying on page
error_reporting(0);

?>

提前致谢！

Answer 1

if($username==$dbusername&&md5($password)==$dbpassword)
   {

       $_SESSION['username'] = $username;
       header( 'Location: http://www.yoursite.com/new_page.html' ) ;   

   }

Answer 2

一旦完成工作，你应该把它放在：

之后

//echo "You are logged in. <a href='main.php'>Continue to site.</a>";
$_SESSION['username'] = $username;
header('Location: your url');
exit;

不要忘记“退出”或将执行以下操作。

也就是说，在重定向之前你不能回应一些东西，这是合乎逻辑的，因为无法看到回声。

所以，要么你不回应：

$_SESSION['username'] = $username;
header('Location: your url');
exit;

或者您执行HTML（或javascript）重定向，延迟时间为5秒：

echo "You are logged in. <a href='main.php'>Continue to site.</a>";
$_SESSION['username'] = $username;
exit;

在这种情况下你必须把它放在＆lt;头＆gt;部分，进行HTML重定向：

<meta http-equiv="refresh" content="0; url=http://example.com/main.php" />

另外

error_reporting(0);

应该放在页面的开头，除非你想要显示以前行的错误。

但是：error_reporting（0）;不应该在开发站点上使用（并且始终在生产站点上）。

您应该打开display_errors（'on'）和error_reporting（E_ALL）来查看错误 - 错误对开发人员非常有用。

如何使用header（）提交表单后重定向到不同的页面？

2 个答案: