Message logging with observer-based log writing.
This class does not support extensions, only additional writers.
Class declared in SYSPATH/classes/log.php on line 3.
integer 0
integer 1
integer 2
integer 3
integer 4
integer 5
integer 6
integer 7
string $timestamptimestamp format for log entries
string(11) "Y-m-d H:i:s"string $timezonetimezone for log entries
NULL
boolean $write_on_addimmediately write when logs are added
bool FALSE
Log $_instanceSingleton instance container
object Log()
array $_messageslist of added messages
array $_writerslist of log writers
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,
));
string
$level
required - Level of messagestring
$message
required - Message bodyarray
$values
= NULL - Values to replace in the messageLogpublic function add($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;
}Attaches a log writer, and optionally limits the levels of messages that will be written by the writer.
$log->attach($writer);
Log_Writer
$writer
required - Instancemixed
$levels
= array(0) - Array of messages levels to write OR max level to writeinteger
$min_level
= integer 0 - Min level to write IF $levels is not an arrayLogpublic 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;
}Detaches a log writer. The same writer object must be used.
$log->detach($writer);
Log_Writer
$writer
required - InstanceLogpublic function detach(Log_Writer $writer)
{
// Remove the writer
unset($this->_writers["{$writer}"]);
return $this;
}Get the singleton instance of this class and enable writing at shutdown.
$log = Log::instance();
Logpublic static function instance()
{
if (Log::$_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;
}Write and clear all of the messages.
$log->write();
voidpublic function write()
{
if (empty($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);
}
}
}