<?php

$url = $_POST["url"];

$pattern = '/^https:\/\/drive\.google\.com\/file\/d\/([^\/]+)\/.*$/';

preg_match($pattern, $url, $matches);

$id = $matches[1];

$key = "AIzaSyDr9Zq0ESlyTolyxDEQIiUh2q84CaEzFoE";

$url = "https://www.googleapis.com/drive/v3/files/$id?key=$key&alt=media";

echo $url;

?>