name : FeatureDetection.php <?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.'); } } }