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<?php
declare(strict_types=1);
namespace WebThumbnailer\Utils;
/**
* Util class for operations on URL strings.
*/
class UrlUtils
{
* Extract the domains from an URL.
*
* @param string $url Given URL.
* @return string Extracted domains, lowercase.
public static function getDomain(string $url): string
if (!parse_url($url, PHP_URL_SCHEME)) {
$url = 'http://' . $url;
}
return strtolower(parse_url($url, PHP_URL_HOST) ?: '');
* Retrieve the file extension from a URL.
* @param string $url given URL.
* @return string File extension or false if not found.
public static function getUrlFileExtension(string $url): string
$path = parse_url($url, PHP_URL_PATH) ?: '';
if (preg_match('/\.(\w+)$/i', $path, $match) > 0) {
return strtolower($match[1]);
return '';