<?php

/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/

namespace Symfony\Component\Debug;

/**
* Registers all the debug tools.
*
* @author Fabien Potencier <fabien@symfony.com>
*/
class Debug
{
private static $enabled = false;

/**
* Enables the debug tools.
*
* This method registers an error handler and an exception handler.
*
* If the Symfony ClassLoader component is available, a special
* class loader is also registered.
*
* @param int $errorReportingLevel The level of error reporting you want
* @param bool $displayErrors Whether to display errors (for development) or just log them (for production)
*/
public static function enable($errorReportingLevel = E_ALL, $displayErrors = true)
{
if (static::$enabled) {
return;
}

static::$enabled = true;

if (null !== $errorReportingLevel) {
error_reporting($errorReportingLevel);
} else {
error_reporting(E_ALL);
}

if ('cli' !== PHP_SAPI) {
ini_set('display_errors', 0);
ExceptionHandler::register();
} elseif ($displayErrors && (!ini_get('log_errors') || ini_get('error_log'))) {
// CLI - display errors only if they're not already logged to STDERR
ini_set('display_errors', 1);
}
if ($displayErrors) {
ErrorHandler::register(new ErrorHandler(new BufferingLogger()));
} else {
ErrorHandler::register()->throwAt(0, true);
}

DebugClassLoader::enable();
}
}