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<?php
/**
* League.Uri (https://uri.thephpleague.com)
*
* (c) Ignace Nyamagana Butera <nyamsprod@gmail.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
declare(strict_types=1);
namespace League\Uri;
use finfo;
use League\Uri\Exceptions\MissingFeature;
use League\Uri\IPv4\Calculator;
use const PHP_INT_SIZE;
/**
* Allow detecting features needed to make the packages work.
*/
final class FeatureDetection
{
public static function supportsFileDetection(): void
{
static $isSupported = null;
$isSupported = $isSupported ?? class_exists(finfo::class);
if (!$isSupported) {
throw new MissingFeature('Support for file type detection requires the `fileinfo` extension.');
}
}
public static function supportsIdn(): void
{
static $isSupported = null;
$isSupported = $isSupported ?? (function_exists('\idn_to_ascii') && defined('\INTL_IDNA_VARIANT_UTS46'));
if (!$isSupported) {
throw new MissingFeature('Support for IDN host requires the `intl` extension for best performance or run "composer require symfony/polyfill-intl-idn" to install a polyfill.');
}
}
public static function supportsIPv4Conversion(): void
{
static $isSupported = null;
$isSupported = $isSupported ?? (extension_loaded('gmp') || extension_loaded('bcmath') || (4 < PHP_INT_SIZE));
if (!$isSupported) {
throw new MissingFeature('A '.Calculator::class.' implementation could not be automatically loaded. To perform IPv4 conversion use a x.64 PHP build or install one of the following extension GMP or BCMath. You can also ship your own implmentation.');
}
}
}
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