To use a proxy in PHP, the most common method is to configure PHP’s cURL library to route HTTP requests through a proxy server.PHP's cURL library can be set up to use a proxy by specifying proxy settings with curl_setopt().Another approach is to use a PHP proxy script that acts as an intermediary between your client and the target website.This method is useful if you want to control proxying at the PHP application level rather than relying on external proxy servers.