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<?php /* * This file is part of Composer. * * (c) Nils Adermann <[email protected]> * Jordi Boggiano <[email protected]> * * For the full copyright and license information, please view the LICENSE * file that was distributed with this source code. */ namespace Composer\Util; /** * Temporarily suppress PHP error reporting, usually warnings and below. * * @author Niels Keurentjes <[email protected]> */ class Silencer { /** * @var int[] Unpop stack */ private static $stack = array(); /** * Suppresses given mask or errors. * * @param int|null $mask Error levels to suppress, default value NULL indicates all warnings and below. * @return int The old error reporting level. */ public static function suppress($mask = null) { if (!isset($mask)) { $mask = E_WARNING | E_NOTICE | E_USER_WARNING | E_USER_NOTICE | E_DEPRECATED | E_USER_DEPRECATED | E_STRICT; } $old = error_reporting(); self::$stack[] = $old; error_reporting($old & ~$mask); return $old; } /** * Restores a single state. */ public static function restore() { if (!empty(self::$stack)) { error_reporting(array_pop(self::$stack)); } } /** * Calls a specified function while silencing warnings and below. * * Future improvement: when PHP requirements are raised add Callable type hint (5.4) and variadic parameters (5.6) * * @param callable $callable Function to execute. * @throws \Exception Any exceptions from the callback are rethrown. * @return mixed Return value of the callback. */ public static function call($callable /*, ...$parameters */) { try { self::suppress(); $result = call_user_func_array($callable, array_slice(func_get_args(), 1)); self::restore(); return $result; } catch (\Exception $e) { // Use a finally block for this when requirements are raised to PHP 5.5 self::restore(); throw $e; } } }