在表单操作中使用PHP_SELF在标头重定向上丢失了PHP会话变量

问题描述：

I have a multi-step form, let's say for the sake of ease it's 2 steps. First step I want to select a radio button and based on that radio button selection it takes me to a certain page, but I also want that selection stored in a session. I have 2 pages: page1.php

session_start();

if(isset($_POST['post'])) {
if (($_POST['country'] == 'US')) {
header("Location: US_Products.php"); }
elseif (($_POST['country'] == 'CDN')) {
header("Location: CDN_Products.php"); }
else { die("Error"); }
exit;
}
<form action="<?php echo $_SERVER['PHP_SELF']; ?>" method="post">
<label for="USA">USA:</label>
<input type="radio" name="country" value="US">
<label for="CDN">Canada:</label>
<input type="radio" name="country" value="CDN">
<input type="submit" name="post" value="Go To Filter">
</form>

Page2.php (either A or B)

session_start();
$_SESSION['country'] = $_POST['country'];
<?php echo $_SESSION['country']; ?>

The Country choice is not being passed when I have it do this conditional redirect. Is there a problem with session variables and redirects or session variables and PHP_SELF or something?

我有一个多步形式，让我们说为了方便它的两个步骤。第一步我想选择一个单选按钮，并根据单选按钮选择它将我带到某个页面，但我也希望选择存储在会话中。我有2页： page1.php p>

  session_start（）; 
 
if（isset（$ _ POST ['post']））{
if（（$ _POST）  ['country'] =='US'））{
header（“Location：US_Products.php”）;  } 
elseif（（$ _POST ['country'] =='CDN'））{
header（“Location：CDN_Products.php”）;  } 
else {die（“Error”）;  } 
exit; 
} 
＆lt; form action =“＆lt;？php echo $ _SERVER ['PHP_SELF'];？＆gt;”  method =“post”＆gt; 
＆lt; label for =“USA”＆gt; USA：＆lt; / label＆gt; 
＆lt; input type =“radio”name =“country”value =“US”＆gt; 
＆lt; label  for =“CDN”＆gt; Canada：＆lt; / label＆gt; 
＆lt; input type =“radio”name =“country”value =“CDN”＆gt; 
＆lt; input type =“submit”name =“post”value  =“转到过滤器”＆gt; 
＆lt; / form＆gt; 
  code>  pre> 
 
  Page2.php（A或B） p> 
 
 
  session_start（）; 
 $ _SESSION ['country'] = $ _POST ['country']; 
＆lt;？php echo $ _SESSION ['country'];  ？＆gt; 
  code>  pre> 
 
 当我执行此条件重定向时，未传递Country选项。 会话变量和重定向或会话变量以及PHP_SELF有什么问题吗？ p> 
  div>

答

Page 1:

session_start();

if(isset($_POST['post'])) {
    $_SESSION['country'] = $_POST['country'];
    if (($_POST['country'] == 'US')) {
        header("Location: US_Products.php"); }
    elseif (($_POST['country'] == 'CDN')) {
        header("Location: CDN_Products.php"); }
    else { die("Error"); }
    exit;
}
<form action="<?php echo $_SERVER['PHP_SELF']; ?>" method="post">
<label for="USA">USA:</label>
<input type="radio" name="country" value="US">
<label for="CDN">Canada:</label>
<input type="radio" name="country" value="CDN">
<input type="submit" name="post" value="Go To Filter">
</form>

Page 2:

session_start();
<?php echo $_SESSION['country']; ?>

Or using include method, just use one page:

session_start();

if(isset($_POST['post'])) {
    if (($_POST['country'] == 'US')) {
        include("US_Products.php"); }
    elseif (($_POST['country'] == 'CDN')) {
        include("CDN_Products.php"); }
    else { die("Error"); }
    exit;
}
<form action="<?php echo $_SERVER['PHP_SELF']; ?>" method="post">
<label for="USA">USA:</label>
<input type="radio" name="country" value="US">
<label for="CDN">Canada:</label>
<input type="radio" name="country" value="CDN">
<input type="submit" name="post" value="Go To Filter">
</form>

and you should be able to use echo $_POST['country'] on US_Products.php and CDN_Products.php, or

答

Set the session variable before you redirect - the post is lost, as the redirect is essentially a regular GET request

if (($_POST['country'] == 'US')) 
{
  $_SESSION['country'] = $_POST['country'];
  header("Location: US_Products.php"); 
}
elseif (($_POST['country'] == 'CDN')) 
{
  $_SESSION['country'] = $_POST['country'];
  header("Location: CDN_Products.php"); 
}
else 
{ 
  die("Error"); 
}

在表单操作中使用PHP_SELF在标头重定向上丢失了PHP会话变量

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