How can the use of HTTP redirection affect the transfer of POST data in PHP applications?

HTTP redirection can affect the transfer of POST data in PHP applications because when a POST request is redirected using a header() function, the POST data is not automatically passed along to the redirected page. To solve this issue, you can use session variables to store the POST data before redirection and then retrieve it on the redirected page. 

// Store POST data in session variables before redirection
session_start();
$_SESSION['post_data'] = $_POST;

// Redirect to another page
header('Location: redirected_page.php');
exit();
```

On the redirected_page.php, you can retrieve the POST data from the session variables:

```php
// Retrieve POST data from session variables
session_start();
if(isset($_SESSION['post_data'])){
    $post_data = $_SESSION['post_data'];
    // Do something with the POST data
}

Keywords

HTTP redirection POST data PHP applications header function 302 redirect

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