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Current File : /var/www/web032/htdocs/cms/libraries/legacy/error/error.php
<?php
/**
 * @package     Joomla.Legacy
 * @subpackage  Error
 *
 * @copyright   (C) 2005 Open Source Matters, Inc. <https://www.joomla.org>
 * @license     GNU General Public License version 2 or later; see LICENSE.txt
 */

defined('JPATH_PLATFORM') or die;

/**
 * Error Definition: Illegal Options
 *
 * @var    integer
 * @since  1.5
 * @deprecated  4.0
 */
const JERROR_ILLEGAL_OPTIONS = 1;

/**
 * Error Definition: Callback does not exist
 *
 * @var    integer
 * @since  1.5
 * @deprecated  4.0
 */
const JERROR_CALLBACK_NOT_CALLABLE = 2;

/**
 * Error Definition: Illegal Handler
 *
 * @var    integer
 * @since  1.5
 * @deprecated  4.0
 */
const JERROR_ILLEGAL_MODE = 3;

/**
 * Error Handling Class
 *
 * This class is inspired in design and concept by patErrorManager <http://www.php-tools.net>
 *
 * patErrorManager contributors include:
 * - gERD Schaufelberger	<gerd@php-tools.net>
 * - Sebastian Mordziol	<argh@php-tools.net>
 * - Stephan Schmidt		<scst@php-tools.net>
 *
 * @since       1.5
 * @deprecated  4.0 Will be removed without replacement
 */
abstract class JError
{
	/**
	 * Legacy error handling marker
	 *
	 * @var    boolean  True to enable legacy error handling using JError, false to use exception handling.  This flag
	 *                  is present to allow an easy transition into exception handling for code written against the
	 *                  existing JError API in Joomla.
	 * @since  1.7
	 * @deprecated  4.0
	 */
	public static $legacy = false;

	/**
	 * Array of message levels
	 *
	 * @var    array
	 * @since  1.6
	 * @deprecated  4.0
	 */
	protected static $levels = array(E_NOTICE => 'Notice', E_WARNING => 'Warning', E_ERROR => 'Error');

	/**
	 * Array of message handlers
	 *
	 * @var    array
	 * @since  1.6
	 * @deprecated  4.0
	 */
	protected static $handlers = array(
		E_NOTICE => array('mode' => 'ignore'),
		E_WARNING => array('mode' => 'ignore'),
		E_ERROR => array('mode' => 'ignore'),
	);

	/**
	 * Array containing the error stack
	 *
	 * @var    JException[]
	 * @since  1.6
	 * @deprecated  4.0
	 */
	protected static $stack = array();

	/**
	 * Method to determine if a value is an exception object.
	 *
	 * @param   mixed  $object  Object to check.
	 *
	 * @return  boolean  True if argument is an exception, false otherwise.
	 *
	 * @since   1.5
	 * @deprecated  4.0
	 */
	public static function isError($object)
	{
		JLog::add('JError::isError() is deprecated.', JLog::WARNING, 'deprecated');

		return $object instanceof Exception;
	}

	/**
	 * Method for retrieving the last exception object in the error stack
	 *
	 * @param   boolean  $unset  True to remove the error from the stack.
	 *
	 * @return  JException|boolean  Last JException object in the error stack or boolean false if none exist
	 *
	 * @since   1.5
	 * @deprecated  4.0
	 */
	public static function getError($unset = false)
	{
		JLog::add('JError::getError() is deprecated.', JLog::WARNING, 'deprecated');

		if (!isset(self::$stack[0]))
		{
			return false;
		}

		if ($unset)
		{
			$error = array_shift(self::$stack);
		}
		else
		{
			$error = &self::$stack[0];
		}

		return $error;
	}

	/**
	 * Method for retrieving the exception stack
	 *
	 * @return  JException[]  Chronological array of errors that have been stored during script execution
	 *
	 * @since   1.5
	 * @deprecated  4.0
	 */
	public static function getErrors()
	{
		JLog::add('JError::getErrors() is deprecated.', JLog::WARNING, 'deprecated');

		return self::$stack;
	}

	/**
	 * Method to add non-JError thrown JExceptions to the JError stack for debugging purposes
	 *
	 * @param   JException  $e  Add an exception to the stack.
	 *
	 * @return  void
	 *
	 * @since   1.6
	 * @deprecated  4.0
	 */
	public static function addToStack(JException $e)
	{
		JLog::add('JError::addToStack() is deprecated.', JLog::WARNING, 'deprecated');

		self::$stack[] = &$e;
	}

	/**
	 * Create a new JException object given the passed arguments
	 *
	 * @param   integer  $level      The error level - use any of PHP's own error levels for
	 *                               this: E_ERROR, E_WARNING, E_NOTICE, E_USER_ERROR,
	 *                               E_USER_WARNING, E_USER_NOTICE.
	 * @param   string   $code       The application-internal error code for this error
	 * @param   string   $msg        The error message, which may also be shown the user if need be.
	 * @param   mixed    $info       Optional: Additional error information (usually only
	 *                               developer-relevant information that the user should never see,
	 *                               like a database DSN).
	 * @param   boolean  $backtrace  Add a stack backtrace to the exception.
	 *
	 * @return  JException
	 *
	 * @since   1.5
	 * @deprecated  4.0
	 * @see         JException
	 */
	public static function raise($level, $code, $msg, $info = null, $backtrace = false)
	{
		JLog::add('JError::raise() is deprecated.', JLog::WARNING, 'deprecated');

		// Build error object
		$exception = new JException($msg, $code, $level, $info, $backtrace);

		return self::throwError($exception);
	}

	/**
	 * Throw an error
	 *
	 * @param   JException  &$exception  An exception to throw.
	 *
	 * @return  JException  A reference to the handled JException object
	 *
	 * @since   1.6
	 * @deprecated  4.0 Just throw an Exception
	 * @see     JException
	 */
	public static function throwError(&$exception)
	{
		JLog::add('JError::throwError() is deprecated.', JLog::WARNING, 'deprecated');

		static $thrown = false;

		// If thrown is hit again, we've come back to JError in the middle of throwing another JError, so die!
		if ($thrown)
		{
			self::handleEcho($exception, array());

			// Inifite loop.
			jexit();
		}

		$thrown = true;
		$level = $exception->get('level');

		// See what to do with this kind of error
		$handler = self::getErrorHandling($level);

		$function = 'handle' . ucfirst($handler['mode']);

		if (is_callable(array('JError', $function)))
		{
			$reference = call_user_func_array(array('JError', $function), array(&$exception, isset($handler['options']) ? $handler['options'] : array()));
		}
		else
		{
			// This is required to prevent a very unhelpful white-screen-of-death
			jexit(
				'JError::raise -> Static method JError::' . $function . ' does not exist. Contact a developer to debug' .
				'<br /><strong>Error was</strong> <br />' . $exception->getMessage()
			);
		}
		// We don't need to store the error, since JException already does that for us!
		// Remove loop check
		$thrown = false;

		return $reference;
	}

	/**
	 * Wrapper method for the raise() method with predefined error level of E_ERROR and backtrace set to true.
	 *
	 * @param   string  $code  The application-internal error code for this error
	 * @param   string  $msg   The error message, which may also be shown the user if need be.
	 * @param   mixed   $info  Optional: Additional error information (usually only
	 *                         developer-relevant information that the user should
	 *                         never see, like a database DSN).
	 *
	 * @return  JException  $error  The thrown JException object
	 *
	 * @since   1.5
	 * @deprecated  4.0 Just throw an Exception
	 * @see     JError::raise()
	 */
	public static function raiseError($code, $msg, $info = null)
	{
		JLog::add('JError::raiseError() is deprecated.', JLog::WARNING, 'deprecated');

		return self::raise(E_ERROR, $code, $msg, $info, true);
	}

	/**
	 * Wrapper method for the {@link raise()} method with predefined error level of E_WARNING and backtrace set to false.
	 *
	 * @param   string  $code  The application-internal error code for this error
	 * @param   string  $msg   The error message, which may also be shown the user if need be.
	 * @param   mixed   $info  Optional: Additional error information (usually only
	 *                         developer-relevant information that
	 *                         the user should never see, like a database DSN).
	 *
	 * @return  JException  $error  The thrown JException object
	 *
	 * @since   1.5
	 * @deprecated  4.0 Use \Joomla\CMS\Factory::getApplication()->enqueueMessage($msg, 'warning') when wou want to notify the UI
	 * @see     JError::raise()
	 */
	public static function raiseWarning($code, $msg, $info = null)
	{
		JLog::add('JError::raiseWarning() is deprecated.', JLog::WARNING, 'deprecated');

		return self::raise(E_WARNING, $code, $msg, $info);
	}

	/**
	 * Wrapper method for the {@link raise()} method with predefined error level of E_NOTICE and backtrace set to false.
	 *
	 * @param   string  $code  The application-internal error code for this error
	 * @param   string  $msg   The error message, which may also be shown the user if need be.
	 * @param   mixed   $info  Optional: Additional error information (usually only
	 *                         developer-relevant information that the user
	 *                         should never see, like a database DSN).
	 *
	 * @return  JException  $error  The thrown JException object
	 *
	 * @since   1.5
	 * @deprecated  4.0 Use \Joomla\CMS\Factory::getApplication()->enqueueMessage($msg, 'notice') when wou want to notify the UI
	 * @see     JError::raise()
	 */
	public static function raiseNotice($code, $msg, $info = null)
	{
		JLog::add('JError::raiseNotice() is deprecated.', JLog::WARNING, 'deprecated');

		return self::raise(E_NOTICE, $code, $msg, $info);
	}

	/**
	 * Method to get the current error handler settings for a specified error level.
	 *
	 * @param   integer  $level  The error level to retrieve. This can be any of PHP's
	 *                           own error levels, e.g. E_ALL, E_NOTICE...
	 *
	 * @return  array    All error handling details
	 *
	 * @since   1.5
	 * @deprecated  4.0
	 */
	public static function getErrorHandling($level)
	{
		JLog::add('JError::getErrorHandling() is deprecated.', JLog::WARNING, 'deprecated');

		return self::$handlers[$level];
	}

	/**
	 * Method to set the way the JError will handle different error levels. Use this if you want to override the default settings.
	 *
	 * Error handling modes:
	 * - ignore
	 * - echo
	 * - verbose
	 * - die
	 * - message
	 * - log
	 * - callback
	 *
	 * You may also set the error handling for several modes at once using PHP's bit operations.
	 * Examples:
	 * - E_ALL = Set the handling for all levels
	 * - E_ERROR | E_WARNING = Set the handling for errors and warnings
	 * - E_ALL ^ E_ERROR = Set the handling for all levels except errors
	 *
	 * @param   integer  $level    The error level for which to set the error handling
	 * @param   string   $mode     The mode to use for the error handling.
	 * @param   mixed    $options  Optional: Any options needed for the given mode.
	 *
	 * @return  boolean|JException  True on success or a JException object if failed.
	 *
	 * @since   1.5
	 * @deprecated  4.0
	 */
	public static function setErrorHandling($level, $mode, $options = null)
	{
		JLog::add('JError::setErrorHandling() is deprecated.', JLog::WARNING, 'deprecated');

		$levels = self::$levels;

		$function = 'handle' . ucfirst($mode);

		if (!is_callable(array('JError', $function)))
		{
			return self::raiseError(E_ERROR, 'JError:' . JERROR_ILLEGAL_MODE, 'Error Handling mode is not known', 'Mode: ' . $mode . ' is not implemented.');
		}

		foreach ($levels as $eLevel => $eTitle)
		{
			if (($level & $eLevel) !== $eLevel)
			{
				continue;
			}

			// Set callback options
			if ($mode === 'callback')
			{
				if (!is_array($options))
				{
					return self::raiseError(E_ERROR, 'JError:' . JERROR_ILLEGAL_OPTIONS, 'Options for callback not valid');
				}

				if (!is_callable($options))
				{
					$tmp = array('GLOBAL');

					if (is_array($options))
					{
						$tmp[0] = $options[0];
						$tmp[1] = $options[1];
					}
					else
					{
						$tmp[1] = $options;
					}

					return self::raiseError(
						E_ERROR,
						'JError:' . JERROR_CALLBACK_NOT_CALLABLE,
						'Function is not callable',
						'Function:' . $tmp[1] . ' scope ' . $tmp[0] . '.'
					);
				}
			}

			// Save settings
			self::$handlers[$eLevel] = array('mode' => $mode);

			if ($options != null)
			{
				self::$handlers[$eLevel]['options'] = $options;
			}
		}

		return true;
	}

	/**
	 * Method that attaches the error handler to JError
	 *
	 * @return  void
	 *
	 * @since   1.5
	 * @deprecated  4.0
	 * @see     set_error_handler
	 */
	public static function attachHandler()
	{
		JLog::add('JError::getErrorHandling() is deprecated.', JLog::WARNING, 'deprecated');

		set_error_handler(array('JError', 'customErrorHandler'));
	}

	/**
	 * Method that detaches the error handler from JError
	 *
	 * @return  void
	 *
	 * @since   1.5
	 * @deprecated  4.0
	 * @see     restore_error_handler
	 */
	public static function detachHandler()
	{
		JLog::add('JError::detachHandler() is deprecated.', JLog::WARNING, 'deprecated');

		restore_error_handler();
	}

	/**
	 * Method to register a new error level for handling errors
	 *
	 * This allows you to add custom error levels to the built-in
	 * - E_NOTICE
	 * - E_WARNING
	 * - E_NOTICE
	 *
	 * @param   integer  $level    Error level to register
	 * @param   string   $name     Human readable name for the error level
	 * @param   string   $handler  Error handler to set for the new error level [optional]
	 *
	 * @return  boolean  True on success; false if the level already has been registered
	 *
	 * @since   1.5
	 * @deprecated  4.0
	 */
	public static function registerErrorLevel($level, $name, $handler = 'ignore')
	{
		JLog::add('JError::registerErrorLevel() is deprecated.', JLog::WARNING, 'deprecated');

		if (isset(self::$levels[$level]))
		{
			return false;
		}

		self::$levels[$level] = $name;
		self::setErrorHandling($level, $handler);

		return true;
	}

	/**
	 * Translate an error level integer to a human readable string
	 * e.g. E_ERROR will be translated to 'Error'
	 *
	 * @param   integer  $level  Error level to translate
	 *
	 * @return  string|boolean  Human readable error level name or boolean false if it doesn't exist
	 *
	 * @since   1.5
	 * @deprecated  4.0
	 */
	public static function translateErrorLevel($level)
	{
		JLog::add('JError::translateErrorLevel() is deprecated.', JLog::WARNING, 'deprecated');

		if (isset(self::$levels[$level]))
		{
			return self::$levels[$level];
		}

		return false;
	}

	/**
	 * Ignore error handler
	 * - Ignores the error
	 *
	 * @param   JException  &$error   Exception object to handle
	 * @param   array       $options  Handler options
	 *
	 * @return  JException   The exception object
	 *
	 * @since   1.5
	 * @deprecated  4.0
	 * @see     JError::raise()
	 */
	public static function handleIgnore(&$error, $options)
	{
		JLog::add('JError::handleIgnore() is deprecated.', JLog::WARNING, 'deprecated');

		return $error;
	}

	/**
	 * Echo error handler
	 * - Echos the error message to output
	 *
	 * @param   JException  &$error   Exception object to handle
	 * @param   array       $options  Handler options
	 *
	 * @return  JException  The exception object
	 *
	 * @since   1.5
	 * @deprecated  4.0
	 * @see    JError::raise()
	 */
	public static function handleEcho(&$error, $options)
	{
		JLog::add('JError::handleEcho() is deprecated.', JLog::WARNING, 'deprecated');

		$level_human = self::translateErrorLevel($error->get('level'));

		// If system debug is set, then output some more information.
		if (JDEBUG)
		{
			$backtrace = $error->getTrace();
			$trace = '';

			for ($i = count($backtrace) - 1; $i >= 0; $i--)
			{
				if (isset($backtrace[$i]['class']))
				{
					$trace .= sprintf("\n%s %s %s()", $backtrace[$i]['class'], $backtrace[$i]['type'], $backtrace[$i]['function']);
				}
				else
				{
					$trace .= sprintf("\n%s()", $backtrace[$i]['function']);
				}

				if (isset($backtrace[$i]['file']))
				{
					$trace .= sprintf(' @ %s:%d', $backtrace[$i]['file'], $backtrace[$i]['line']);
				}
			}
		}

		if (isset($_SERVER['HTTP_HOST']))
		{
			// Output as html
			echo "<br /><b>jos-$level_human</b>: "
				. $error->get('message') . "<br />\n"
				. (JDEBUG ? nl2br($trace) : '');
		}
		else
		{
			// Output as simple text
			if (defined('STDERR'))
			{
				fwrite(STDERR, "J$level_human: " . $error->get('message') . "\n");

				if (JDEBUG)
				{
					fwrite(STDERR, $trace);
				}
			}
			else
			{
				echo "J$level_human: " . $error->get('message') . "\n";

				if (JDEBUG)
				{
					echo $trace;
				}
			}
		}

		return $error;
	}

	/**
	 * Verbose error handler
	 * - Echos the error message to output as well as related info
	 *
	 * @param   JException  &$error   Exception object to handle
	 * @param   array       $options  Handler options
	 *
	 * @return  JException  The exception object
	 *
	 * @since   1.5
	 * @deprecated  4.0
	 * @see    JError::raise()
	 */
	public static function handleVerbose(&$error, $options)
	{
		JLog::add('JError::handleVerbose() is deprecated.', JLog::WARNING, 'deprecated');

		$level_human = self::translateErrorLevel($error->get('level'));
		$info = $error->get('info');

		if (isset($_SERVER['HTTP_HOST']))
		{
			// Output as html
			echo "<br /><b>J$level_human</b>: " . $error->get('message') . "<br />\n";

			if ($info != null)
			{
				echo '&#160;&#160;&#160;' . $info . "<br />\n";
			}

			echo $error->getBacktrace(true);
		}
		else
		{
			// Output as simple text
			echo "J$level_human: " . $error->get('message') . "\n";

			if ($info != null)
			{
				echo "\t" . $info . "\n";
			}
		}

		return $error;
	}

	/**
	 * Die error handler
	 * - Echos the error message to output and then dies
	 *
	 * @param   JException  &$error   Exception object to handle
	 * @param   array       $options  Handler options
	 *
	 * @return  void  Calls die()
	 *
	 * @since   1.5
	 * @deprecated  4.0
	 * @see    JError::raise()
	 */
	public static function handleDie(&$error, $options)
	{
		JLog::add('JError::handleDie() is deprecated.', JLog::WARNING, 'deprecated');

		$level_human = self::translateErrorLevel($error->get('level'));

		if (isset($_SERVER['HTTP_HOST']))
		{
			// Output as html
			jexit("<br /><b>J$level_human</b>: " . $error->get('message') . "<br />\n");
		}
		else
		{
			// Output as simple text
			if (defined('STDERR'))
			{
				fwrite(STDERR, "J$level_human: " . $error->get('message') . "\n");
				jexit();
			}
			else
			{
				jexit("J$level_human: " . $error->get('message') . "\n");
			}
		}

		return $error;
	}

	/**
	 * Message error handler
	 * Enqueues the error message into the system queue
	 *
	 * @param   JException  &$error   Exception object to handle
	 * @param   array       $options  Handler options
	 *
	 * @return  JException  The exception object
	 *
	 * @since   1.5
	 * @deprecated  4.0
	 * @see    JError::raise()
	 */
	public static function handleMessage(&$error, $options)
	{
		JLog::add('JError::hanleMessage() is deprecated.', JLog::WARNING, 'deprecated');

		$appl = JFactory::getApplication();
		$type = ($error->get('level') == E_NOTICE) ? 'notice' : 'error';
		$appl->enqueueMessage($error->get('message'), $type);

		return $error;
	}

	/**
	 * Log error handler
	 * Logs the error message to a system log file
	 *
	 * @param   JException  &$error   Exception object to handle
	 * @param   array       $options  Handler options
	 *
	 * @return  JException  The exception object
	 *
	 * @since   1.5
	 * @deprecated  4.0
	 * @see    JError::raise()
	 */
	public static function handleLog(&$error, $options)
	{
		JLog::add('JError::handleLog() is deprecated.', JLog::WARNING, 'deprecated');

		static $log;

		if ($log == null)
		{
			$options['text_file'] = date('Y-m-d') . '.error.log';
			$options['format'] = "{DATE}\t{TIME}\t{LEVEL}\t{CODE}\t{MESSAGE}";
			JLog::addLogger($options, JLog::ALL, array('error'));
		}

		$entry = new JLogEntry(
			str_replace(array("\r", "\n"), array('', '\\n'), $error->get('message')),
			$error->get('level'),
			'error'
		);
		$entry->code = $error->get('code');
		JLog::add($entry);

		return $error;
	}

	/**
	 * Callback error handler
	 * - Send the error object to a callback method for error handling
	 *
	 * @param   JException  &$error   Exception object to handle
	 * @param   array       $options  Handler options
	 *
	 * @return  JException  The exception object
	 *
	 * @since   1.5
	 * @deprecated  4.0
	 * @see    JError::raise()
	 */
	public static function handleCallback(&$error, $options)
	{
		JLog::add('JError::handleCallback() is deprecated.', JLog::WARNING, 'deprecated');

		return call_user_func_array($options, array(&$error));
	}

	/**
	 * Display a custom error page and exit gracefully
	 *
	 * @param   JException  $error  Exception object
	 *
	 * @return  void
	 *
	 * @since   1.5
	 * @deprecated  4.0 Use \Joomla\CMS\Exception\ExceptionHandler::render() instead
	 */
	public static function customErrorPage($error)
	{
		JLog::add('JError::customErrorPage() is deprecated, use JErrorPage::render() instead.', JLog::WARNING, 'deprecated');

		\Joomla\CMS\Exception\ExceptionHandler::render($error);
	}

	/**
	 * Display a message to the user
	 *
	 * @param   integer  $level  The error level - use any of PHP's own error levels
	 *                   for this: E_ERROR, E_WARNING, E_NOTICE, E_USER_ERROR,
	 *                   E_USER_WARNING, E_USER_NOTICE.
	 * @param   string   $msg    Error message, shown to user if need be.
	 *
	 * @return  void
	 *
	 * @since   1.5
	 * @deprecated  4.0 Throw an Exception or enqueue the message to the application, eg. \Joomla\CMS\Factory::getApplication()->enqueueMessage($msg)
	 */
	public static function customErrorHandler($level, $msg)
	{
		JLog::add('JError::customErrorHandler() is deprecated.', JLog::WARNING, 'deprecated');

		self::raise($level, '', $msg);
	}

	/**
	 * Render the backtrace
	 *
	 * @param   Exception  $error  The error
	 *
	 * @return  string  Contents of the backtrace
	 *
	 * @since   1.6
	 * @deprecated  4.0 Use JLayoutHelper::render('joomla.error.backtrace', array('backtrace' => $error->getTrace())) instead
	 */
	public static function renderBacktrace($error)
	{
		JLog::add('JError::renderBacktrace() is deprecated.', JLog::WARNING, 'deprecated');

		return \Joomla\CMS\Layout\LayoutHelper::render('joomla.error.backtrace', array('backtrace' => $error->getTrace()));
	}
}

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