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2005 Aurelien 1 
<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');
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/**
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 * CodeIgniter
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 *
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 * An open source application development framework for PHP 4.3.2 or newer
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 *
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 * @package		CodeIgniter
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 * @author		ExpressionEngine Dev Team
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 * @copyright	Copyright (c) 2008, EllisLab, Inc.
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 * @license		http://codeigniter.com/user_guide/license.html
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 * @link		http://codeigniter.com
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 * @since		Version 1.0
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 * @filesource
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 */
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// ------------------------------------------------------------------------
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/**
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 * Logging Class
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 *
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 * @package		CodeIgniter
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 * @subpackage	Libraries
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 * @category	Logging
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 * @author		ExpressionEngine Dev Team
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 * @link		http://codeigniter.com/user_guide/general/errors.html
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 */
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class CI_Log {
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	var $log_path;
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	var $_threshold	= 1;
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	var $_date_fmt	= 'Y-m-d H:i:s';
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	var $_enabled	= TRUE;
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	var $_levels	= array('ERROR' => '1', 'DEBUG' => '2',  'INFO' => '3', 'ALL' => '4');
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	/**
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	 * Constructor
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	 *
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	 * @access	public
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	 */
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	function CI_Log()
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	{
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		$config =& get_config();
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		$this->log_path = ($config['log_path'] != '') ? $config['log_path'] : BASEPATH.'logs/';
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		if ( ! is_dir($this->log_path) OR ! is_really_writable($this->log_path))
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		{
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			$this->_enabled = FALSE;
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		}
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		if (is_numeric($config['log_threshold']))
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		{
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			$this->_threshold = $config['log_threshold'];
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		}
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		if ($config['log_date_format'] != '')
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		{
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			$this->_date_fmt = $config['log_date_format'];
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		}
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	}
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	// --------------------------------------------------------------------
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	/**
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	 * Write Log File
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	 *
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	 * Generally this function will be called using the global log_message() function
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	 *
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	 * @access	public
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	 * @param	string	the error level
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	 * @param	string	the error message
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	 * @param	bool	whether the error is a native PHP error
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	 * @return	bool
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	 */
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	function write_log($level = 'error', $msg, $php_error = FALSE)
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	{
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		if ($this->_enabled === FALSE)
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		{
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			return FALSE;
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		}
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		$level = strtoupper($level);
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		if ( ! isset($this->_levels[$level]) OR ($this->_levels[$level] > $this->_threshold))
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		{
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			return FALSE;
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		}
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		$filepath = $this->log_path.'log-'.date('Y-m-d').EXT;
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		$message  = '';
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		if ( ! file_exists($filepath))
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		{
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			$message .= "<"."?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed'); ?".">\n\n";
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		}
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		if ( ! $fp = @fopen($filepath, FOPEN_WRITE_CREATE))
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		{
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			return FALSE;
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		}
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		$message .= $level.' '.(($level == 'INFO') ? ' -' : '-').' '.date($this->_date_fmt). ' --> '.$msg."\n";
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		flock($fp, LOCK_EX);
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		fwrite($fp, $message);
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		flock($fp, LOCK_UN);
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		fclose($fp);
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		@chmod($filepath, FILE_WRITE_MODE);
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		return TRUE;
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	}
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}
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// END Log Class
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/* End of file Log.php */
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/* Location: ./system/libraries/Log.php */