从 URL 中检测和替换会员 ID

Question

I was trying to detect affiliate ID from URLs for a website running in PHP. the URL examples are

I have changed the affiliate ID into real ones.

https://flipkart.com/product-name/product-id?marketplace=FLIPKART&affid=honor&ppn=something
https://flipkart.com/product-name/product-id?marketplace=FLIPKART&affid=apple&ppn=something
https://flipkart.com/product-name/product-id?marketplace=FLIPKART&affid=sony&ppn=something

I want to replace it with affid=sthachilo

These URLs will be saved in database. So I cant use $_GET["affid"]

when the URL is shown, I just want to replace the affiliate ID. or I can use it to replace the affiliate ID and save it in the database. But I dont know how to detect the affid= section and replace whatever is there.

I tried the following code, but it doesnt seems to be working

    $url = "https://flipkart.com/product-name/product-id?marketplace=FLIPKART&affid=sony&ppn=something";
    $newurl = preg_replace('/&affid=(\d+)/','&affid=sthachilo',$url);
    echo $newurl;

Here is a real URL example with my affiliate ID in it.

https://www.flipkart.com/complan-kesar-badam/p/itmew2cdj5dmthjk?marketplace=FLIPKART&iid=e6c16ab0-c15d-49c2-843e-cf4a5104c53b.MDMETGN5YZZ5MRYG.SEARCH&ppt=browse&lid=LSTMDMETGN5YZZ5MRYGTBFFJO&srno=b_1_1&pid=MDMETGN5YZZ5MRYG&affid=sthachilo&ssid=7bwqga35j40000001588133282410&ppn=browse

atleast I want to remove everything after itmew2cdj5dmthjk and add affiliate ID at the end. for example

https://www.flipkart.com/complan-kesar-badam/p/itmew2cdj5dmthjk?affid=sthachilo

Thanks in advance

Answer 1

you can use parse_url to get the url parts and than use parse_str to get the url query

$url = "https://flipkart.com/product-name/product-id?marketplace=FLIPKART&affid=sony&ppn=something";
// parse url
$parse = parse_url($url);
// parse the query
parse_str($parse['query'], $query);
// replace the affid with your desired value
$query['affid'] = 'samsung';
// rebuild the query
$parse['query'] = http_build_query($query);
// rebuild the final url
$final_url = $parse['scheme'].'://'.$parse['host'].$parse['path'].'?'.$parse['query'];
echo $final_url
// output : https://flipkart.com/product-name/product-id?marketplace=FLIPKART&affid=samsung&ppn=something

Answer 2

To replace the given affiliate ID with android :

$url = "https://flipkart.com/product-name/product-id?marketplace=FLIPKART&affid=apple&ppn=something";

$newurl = preg_replace('/&affid=(.+)?&/','&affid=android&',$url);

Probably not the best way to do it since it assumes affid is surrounded by & but if you know that will always be the case then this will work.