如何测试PHP中定义的动态URL参数？

Question

I'm calling a fpdf file through an URL. For some calls I need to supply specific parameters, which are only used on specific calls. I cannot update all calls to the FPDF file, so I want to test inside the file, whether a URL parameter exists.

I'm trying like this:

<?php
 require('fpdf.php');
 ini_set('display_errors', 1);
 error_reporting(E_ALL);
 import_request_variables("GP", "rvar_");

 if (isset($rvar_store){
 ... set something
 }

So the URL parameter store will be passed on some php-calls, while there is no parameter on others.

The above doesn't work (I get a blank page).

Question:
How do I test for a URL parameter? I need to test if it is defined?

EDIT:
My url called will look like this:

 fpdf/item.php?iln="+ilns+"&sprache="+locale+"&bestellkeys="+bestellkeys;

or when I have my spec param:

  fpdf/bestellung.php?iln="+ilns+"&sprache="+locale+"&bestellkeys="+bestellkeys+"&store=true";

Answer 1

if your script is available at http://somehost.com/script.php and you call it via http://somehost.com/script.php?param1=value1&param2=value2, you'll have value1,value2 available at $_GET inside the script. If you want to know the name of the script called (script.php) or the host where the script is called (and many more), try $_POST. Is that what you need?