How to organize the pulling of a specific value from the URL into the form?

Question

PHP

There is a link domain.com/index.html?subacc4=asdffdsa123
There is a form with < input name="subid" type="hidden" value="{subid}" / >
subacc4 value needs to be inserted into subid somehow

Answer 1

< input name="subid" type="hidden" value="<?=$_GET['subacc4'];?>" / >

Answer 2

<?php
$url = 'http://username:[email protected]/path?arg=value#anchor';
print_r(parse_url($url));
echo parse_url($url, PHP_URL_PATH);

The result of running this example:

Array
(
[scheme] => http
[host] => hostname
[user] => username
[pass] => password
[path] => /path
[query] => arg=value
[fragment] => anchor
)

Answer 3

let link = 'domain.com/index.html?subacc4=asdffdsa123&deat=ojdai33';
let cutLink = link.substr(link.lastIndexOf('?') + 1);
let url = new URLSearchParams(cutLink);
let subid = url.get('subacc4');
console.log(subid)