split url in php code example

Example 1: how to split url in php

<?php
$url = 'http://www.example.com/news?q=string&f=true&id=1233&sort=true';

$values = parse_url($url);

$host = explode('.',$values['host']);

echo $host[1];

?>

Example 2: 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