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