How to keep all the POST information while redirecting in PHP?

Question

header('Location: ' . $uri);

This will miss all the $_POST information.

Answer 1

Don't use $_SESSION as you have been suggested. Session data is shared with all other pages, including the ones open in other tabs. You may get unpredictable behaviour if you use the same trick in multiple places of your website.

An untested better code would be something like this.

session_start();
$data_id = md5( time().microtime().rand(0,100) );
$_SESSION["POSTDATA_$data_id"] = $_POST;
header('Location: ' . $uri."?data_id=$data_id");

In the next page you may retrieve the previous post like this

session_start();
$post = array();
$data_key = 'POSTDATA_'.$_GET['data_id'];
if ( !empty ( $_GET['data_id'] ) && !empty( $_SESSION[$data_key] ))
{ 
    $post = $_SESSION[$data_key];
    unset ( $_SESSION[$data_key] );
}

The code above is not tested, you may have to deal with some error before it works.

Answer 2

if u want to carry forward your POST data to another pages ( except the action page) then use

session_start();
$_SESSION['post_data'] = $_POST;