Modules

Kohana_Log

Message logging with observer-based log writing.

This class does not support extensions, only additional writers.

package
Kohana
category
Logging
author
Kohana Team
copyright
© 2008-2012 Kohana Team
license
http://kohanaframework.org/license

Class declared in SYSPATH/classes/kohana/log.php on line 13.

Constants

EMERGENCY

integer 0

ALERT

integer 1

CRITICAL

integer 2

ERROR

integer 3

WARNING

integer 4

NOTICE

integer 5

INFO

integer 6

DEBUG

integer 7

Properties

public static string $timestamp

timestamp format for log entries

string(11) "Y-m-d H:i:s"

public static string $timezone

timezone for log entries

NULL

public static boolean $write_on_add

immediately write when logs are added

bool FALSE

protected static Log $_instance

Singleton instance container

object Log()

protected array $_messages

list of added messages

protected array $_writers

list of log writers

Methods

public add( string $level , string $message [, array $values = NULL ] ) (defined in Kohana_Log)

Adds a message to the log. Replacement values must be passed in to be replaced using strtr.

$log->add(Log::ERROR, 'Could not locate user: :user', array(
    ':user' => $username,
));

Parameters

  • string $level required - Level of message
  • string $message required - Message body
  • array $values = NULL - Values to replace in the message

Return Values

  • Log

Source Code

public function add($level, $message, array $values = NULL)
{
	if ($values)
	{
		// Insert the values into the message
		$message = strtr($message, $values);
	}

	// Create a new message and timestamp it
	$this->_messages[] = array
	(
		'time'  => Date::formatted_time('now', Log::$timestamp, Log::$timezone),
		'level' => $level,
		'body'  => $message,
	);

	if (Log::$write_on_add)
	{
		// Write logs as they are added
		$this->write();
	}

	return $this;
}

public attach( Log_Writer $writer [, mixed $levels = array(0) , integer $min_level = integer 0 ] ) (defined in Kohana_Log)

Attaches a log writer, and optionally limits the levels of messages that will be written by the writer.

$log->attach($writer);

Parameters

  • Log_Writer $writer required - Instance
  • mixed $levels = array(0) - Array of messages levels to write OR max level to write
  • integer $min_level = integer 0 - Min level to write IF $levels is not an array

Return Values

  • Log

Source Code

public function attach(Log_Writer $writer, $levels = array(), $min_level = 0)
{
	if ( ! is_array($levels))
	{
		$levels = range($min_level, $levels);
	}
	
	$this->_writers["{$writer}"] = array
	(
		'object' => $writer,
		'levels' => $levels
	);

	return $this;
}

public detach( Log_Writer $writer ) (defined in Kohana_Log)

Detaches a log writer. The same writer object must be used.

$log->detach($writer);

Parameters

  • Log_Writer $writer required - Instance

Return Values

  • Log

Source Code

public function detach(Log_Writer $writer)
{
	// Remove the writer
	unset($this->_writers["{$writer}"]);

	return $this;
}

public static instance( ) (defined in Kohana_Log)

Get the singleton instance of this class and enable writing at shutdown.

$log = Log::instance();

Return Values

  • Log

Source Code

public static function instance()
{
	if (Log::$_instance === NULL)
	{
		// Create a new instance
		Log::$_instance = new Log;

		// Write the logs at shutdown
		register_shutdown_function(array(Log::$_instance, 'write'));
	}

	return Log::$_instance;
}

public write( ) (defined in Kohana_Log)

Write and clear all of the messages.

$log->write();

Return Values

  • void

Source Code

public function write()
{
	if (empty($this->_messages))
	{
		// There is nothing to write, move along
		return;
	}

	// Import all messages locally
	$messages = $this->_messages;

	// Reset the messages array
	$this->_messages = array();

	foreach ($this->_writers as $writer)
	{
		if (empty($writer['levels']))
		{
			// Write all of the messages
			$writer['object']->write($messages);
		}
		else
		{
			// Filtered messages
			$filtered = array();

			foreach ($messages as $message)
			{
				if (in_array($message['level'], $writer['levels']))
				{
					// Writer accepts this kind of message
					$filtered[] = $message;
				}
			}

			// Write the filtered messages
			$writer['object']->write($filtered);
		}
	}
}