Web Proxy Application built on php-proxy library ready to be installed on your server
I think the other replies misunderstood your question; or maybe I did. But I'd suggest https://www.php-proxy.com/
NOTE: The number of mentions on this list indicates mentions on common posts plus user suggested alternatives. Hence, a higher number means a more popular project.
Http/https proxy with a web page frontend
2 projects | reddit.com/r/selfhosted | 17 Sep 2021
Does anyone know how do use Jdownloader 2 to bypass MEGA dl limits?
1 project | reddit.com/r/Piracy | 23 Jan 2022
Help scraping StockX / Goat / eBay
2 projects | reddit.com/r/webscraping | 16 Jan 2022
What's the best solution for user Authentication/Authorization?
1 project | reddit.com/r/FullStack | 8 Jan 2022
Avete diffidenza nei confronti dei programmi?
1 project | reddit.com/r/ItalyInformatica | 22 Dec 2021