PHP redirect

I need to take the next step with my php redirect. Right now, I need to put lines of code in for every link I want to create. I found a site that has a redirect that would cut my time significantly.

Lets say I have a few affiliates and each affiliate uses a link where you only need to change the item number. Sometimes the item number is at the end of the url and sometimes it is somewhere in the middle. I would like to give a php file 2 id's, site=affiliatesname&item=1234.

how would i modify the following file to get this to work? I dont even know if it is possible for the array to substitute in the item# in the string.

<?php
  $site = $_GET['site'];
  $item = $_GET['item'];

  $sitelink = array(
	"Affiliate_a" => "http://www.affiliate_a.com/item/the-item-number",
	"Affiliate_b" => "http://www.affiliate_b.com/products/the-item-number&morejunk",
);
	
	header("Location:".$sitelink[$site]);
    exit;
?> 

PHP:

 

You can easily insert variables into strings just like what you did with header("Location".$sitelink[$site])). You can either do the ".$item." or just $item directly in it since you're using double quotes (variables will parse in double quotes). If you go with the latter method it's recommended you surround it with curly braces {} so that no other text accidentally hooks onto the variable name and makes PHP think you're trying to use a variable that doesn't exist.

<?php
  $site = $_GET['site'];
  $item = $_GET['item'];

  $sitelink = array(
    "Affiliate_a" => "http://www.affiliate_a.com/item/{$item}",
    "Affiliate_b" => "http://www.affiliate_b.com/products/{$item}&morejunk",
);
   
    header("Location:".$sitelink[$site]);
    exit;
?>

PHP:

 

ok, thanks for the help. I spent a few hours today watching some basic php videos (have been picking things up as i go).