php extract origin from url code example

Example 1: part of url php

//https://www.google.com/search?key=1234
	$url = $_SERVER['REQUEST_URI']; 
    $url_components = parse_url($url); 
    parse_str($url_components['query'], $params); 
    $key = $params['key']; 

// key=1234

Example 2: how to fetch data from url in php properly

use <?php $_SERVER['REQUEST_URI'] ?> in action"" to get the data properly