ExceptionHandler.php
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<?php
/**
* Joomla! Content Management System
*
* @copyright Copyright (C) 2005 - 2019 Open Source Matters, Inc. All rights reserved.
* @license GNU General Public License version 2 or later; see LICENSE.txt
*/
namespace Joomla\CMS\Exception;
defined('JPATH_PLATFORM') or die;
/**
* Displays the custom error page when an uncaught exception occurs.
*
* @since 3.0
*/
class ExceptionHandler
{
/**
* Render the error page based on an exception.
*
* @param \Exception|\Throwable $error An Exception or Throwable (PHP 7+) object for which to render the error page.
*
* @return void
*
* @since 3.0
*/
public static function render($error)
{
$expectedClass = PHP_MAJOR_VERSION >= 7 ? '\Throwable' : '\Exception';
$isException = $error instanceof $expectedClass;
// In PHP 5, the $error object should be an instance of \Exception; PHP 7 should be a Throwable implementation
if ($isException)
{
try
{
// Try to log the error, but don't let the logging cause a fatal error
try
{
\JLog::add(
sprintf(
'Uncaught %1$s of type %2$s thrown. Stack trace: %3$s',
$expectedClass,
get_class($error),
$error->getTraceAsString()
),
\JLog::CRITICAL,
'error'
);
}
catch (\Throwable $e)
{
// Logging failed, don't make a stink about it though
}
catch (\Exception $e)
{
// Logging failed, don't make a stink about it though
}
$app = \JFactory::getApplication();
// If site is offline and it's a 404 error, just go to index (to see offline message, instead of 404)
if ($error->getCode() == '404' && $app->get('offline') == 1)
{
$app->redirect('index.php');
}
$attributes = array(
'charset' => 'utf-8',
'lineend' => 'unix',
'tab' => "\t",
'language' => 'en-GB',
'direction' => 'ltr',
);
// If there is a \JLanguage instance in \JFactory then let's pull the language and direction from its metadata
if (\JFactory::$language)
{
$attributes['language'] = \JFactory::getLanguage()->getTag();
$attributes['direction'] = \JFactory::getLanguage()->isRtl() ? 'rtl' : 'ltr';
}
$document = \JDocument::getInstance('error', $attributes);
if (!$document)
{
// We're probably in an CLI environment
jexit($error->getMessage());
}
// Get the current template from the application
$template = $app->getTemplate();
// Push the error object into the document
$document->setError($error);
if (ob_get_contents())
{
ob_end_clean();
}
$document->setTitle(\JText::_('ERROR') . ': ' . $error->getCode());
$data = $document->render(
false,
array(
'template' => $template,
'directory' => JPATH_THEMES,
'debug' => JDEBUG,
)
);
// Do not allow cache
$app->allowCache(false);
// If nothing was rendered, just use the message from the Exception
if (empty($data))
{
$data = $error->getMessage();
}
$app->setBody($data);
echo $app->toString();
$app->close(0);
// This return is needed to ensure the test suite does not trigger the non-Exception handling below
return;
}
catch (\Throwable $e)
{
// Pass the error down
}
catch (\Exception $e)
{
// Pass the error down
}
}
// This isn't an Exception, we can't handle it.
if (!headers_sent())
{
header('HTTP/1.1 500 Internal Server Error');
}
$message = 'Error';
if ($isException)
{
// Make sure we do not display sensitive data in production environments
if (ini_get('display_errors'))
{
$message .= ': ';
if (isset($e))
{
$message .= $e->getMessage() . ': ';
}
$message .= $error->getMessage();
}
}
echo $message;
jexit(1);
}
}