libs/Yii/logging/CLogFilter.php

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<?php
/**
 * CLogFilter class file
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @link http://www.yiiframework.com/
 * @copyright Copyright &copy; 2008-2011 Yii Software LLC
 * @license http://www.yiiframework.com/license/
 */

/**
 * CLogFilter preprocesses the logged messages before they are handled by a log route.
 *
 * CLogFilter is meant to be used by a log route to preprocess the logged messages
 * before they are handled by the route. The default implementation of CLogFilter
 * prepends additional context information to the logged messages. In particular,
 * by setting {@link logVars}, predefined PHP variables such as
 * $_SERVER, $_POST, etc. can be saved as a log message, which may help identify/debug
 * issues encountered.
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @version $Id$
 * @package system.logging
 */
class CLogFilter extends CComponent implements ILogFilter
{
	/**
	 * @var boolean whether to prefix each log message with the current user session ID.
	 * Defaults to false.
	 */
	public $prefixSession=false;
	/**
	 * @var boolean whether to prefix each log message with the current user
	 * {@link CWebUser::name name} and {@link CWebUser::id ID}. Defaults to false.
	 */
	public $prefixUser=false;
	/**
	 * @var boolean whether to log the current user name and ID. Defaults to true.
	 */
	public $logUser=true;
	/**
	 * @var array list of the PHP predefined variables that should be logged.
	 * Note that a variable must be accessible via $GLOBALS. Otherwise it won't be logged.
	 */
	public $logVars=array('_GET','_POST','_FILES','_COOKIE','_SESSION','_SERVER');


	/**
	 * Filters the given log messages.
	 * This is the main method of CLogFilter. It processes the log messages
	 * by adding context information, etc.
	 * @param array $logs the log messages
	 * @return array
	 */
	public function filter(&$logs)
	{
		if (!empty($logs))
		{
			if(($message=$this->getContext())!=='')
				array_unshift($logs,array($message,CLogger::LEVEL_INFO,'application',YII_BEGIN_TIME));