ators as they use $userinfo['lastactivity'] to determine if a user is online which relies
					// on this to be updated in real time.
					$this->registry->db->shutdown_query("
						UPDATE " . TABLE_PREFIX . "user
						SET lastactivity = " . TIMENOW . "
						WHERE userid = " . $this->userinfo['userid'] . "
					", 'lastvisit');
				}
			}
		}
	}
}

/**
* Class to handle shutdown
*
* @package	vBulletin
* @version	$Revision: 1.243 $
* @author	Scott
* @date		$Date: 2006/08/28 10:56:46 $
*/
class vB_Shutdown
{
	var $shutdown = array();

	function vB_Shutdown()
	{
	}

	/**
	* Singleton emulation - use this function to instantiate the class
	*
	* @return	vB_Shutdown
	*/
	function &init()
	{
		static $instance;

		if (!$instance)
		{
			$instance = new vB_Shutdown();
			// we register this but it might not be used
			if (phpversion() < '5.0.5')
			{
				register_shutdown_function(array(&$instance, '__destruct'));
			}
		}

		return $instance;
	}

	/**
	* Add function to be executed at shutdown
	*
	* @param	string	Name of function to be executed on shutdown
	*/
	function add($function)
	{
		$obj =& vB_Shutdown::init();
		if (function_exists($function) AND !in_array($function, $obj->shutdown))
		{
			$obj->shutdown[] = $function;
		}
	}

	// only called when an object is destroyed, so $this is appropriate
	function __destruct()
	{
		if (!empty($this->shutdown))
		{
			foreach ($this->shutdown AS $key => $funcname)
			{
				$funcname();
				unset($this->shutdown[$key]);
			}
		}
	}
}

// #############################################################################
// misc functions

// #############################################################################
/**
* Feeds database connection errors into the halt() method of the vB_Database class.
*
* @param	integer	Error number
* @param	string	PHP error text string
* @param	strig	File that contained the error
* @param	integer	Line in the file that contained the error
*/
function catch_db_error($errno, $errstr, $errfile, $errline)
{
	global $db;
	static $failures;

	if (strstr($errstr, 'Lost connection') AND $failures < 5)
	{
		$failures++;
		return;
	}

	if (is_object($db))
	{
		$db->halt("$errstr\r\n$errfile on line $errline");
	}
	else
	{
		vb_error_handler($errno, $errstr, $errfile, $errline);
	}
}

// #############################################################################
/**
* Removes the full path from being disclosed on any errors
*
* @param	integer	Error number
* @param	string	PHP error text string
* @param	strig	File that contained the error
* @param	integer	Line in the file that contained the error
*/
function vb_error_handler($errno, $errstr, $errfile, $errline)
{
	switch ($errno)
	{
		case E_WARNING:
		case E_USER_WARNING:
			/* Don't log warnings due to to the false bug reports about valid warnings that we suppress, but still appear in the log
			require_once(DIR . '/includes/functions_log_error.php');
			$message = "Warning: $errstr in $errfile on line $errline";
			log_vbulletin_error($message, 'php');
			*/

			if (!error_reporting() OR !ini_get('display_errors'))
			{
				return;
			}
			$errfile = str_replace(DIR, '', $errfile);
			echo "<br /><strong>Warning</strong>: $errstr in <strong>$errfile</strong> on line <strong>$errline</strong><br />";
		break;

		case E_USER_ERROR:
			require_once(DIR . '/includes/functions_log_error.php');
			$message = "Fatal error: $errstr in $errfile on line $errline";
			log_vbulletin_error($message, 'php');

			if (error_reporting() OR ini_get('display_errors'))
			{
				$errfile = str_replace(DIR, '', $errfile);
				echo "<br /><strong>Fatal error:</strong> $errstr in <strong>$errfile</strong> on line <strong>$errline</strong><br />";
			}
			exit;
		break;
	}
}

// #############################################################################
/**
* Unicode-safe version of htmlspecialchars()
*
* @param	string	Text to be made html-safe
*
* @return	string
*/
function htmlspecialchars_uni($text, $entities = true)
{
	return str_replace(
		// replace special html characters
		array('<', '>', '"'),
		array('&lt;', '&gt;', '&quot;'),
		preg_replace(
			// translates all non-unicode entities
			'/&(?!' . ($entities ? '#[0-9]+' : '(#[0-9]+|[a-z]+)') . ';)/si',
			'&amp;',
			$text
		)
	);
}

/*======================================================================*\
|| ####################################################################
|| # CVS: $RCSfile: class_core.php,v $ - $Revision: 1.243 $
|| ####################################################################
\*======================================================================*/
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