I want to redirect my page when I get POST variable by other external domain, my page is:
When you push the red button "Realizar Pago", automatically open a new windows to bank payment platform. Well, when you finish all the payment bank steps, this external web send me some POST variables with important data to my page.
This is what I want:: when someone click "Realizar Pago", the page stay waiting for new $_POST variables (from payment platform), so when the POST variables are already sended to my page, I want redirect my page to ha payment suscessfully page.
Thanks for help guys, and sorry for my english.
This is not possible in the way you think about it.
PHP executes each request separately. When your server executes the request from the external service you could assume it doesn't know anything about that other request from your user.
The $_POST array is unique for every request and could not be read across requests.
Okay, sounds like you are wanting to connect to an outside webservice from your page and then display the results to your users. In PHP, you'd probably want to create a form processor that takes user data and then uses cURL to pass it along to the banking end. Once the bank receives the request, they will send back a response to you which you can then display to the user or redirect them to a page that says it was a success.
cURL will wait for a while (you can specify how long it waits) for the response from the banking folks. In this example, I have told the program to wait for 30 seconds. If it finishes before the 30 seconds, it will go ahead and close the connection.
<?php
$bank_url = 'http://www.bank.com';
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $bank_url);
curl_setopt($ch, CURLOPT_HEADER, false);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_TIMEOUT, 30);
$response = curl_exec($ch);
print $response;