README

A library to log your activities

Install

composer

composer require mmdm/sim-logger

Or you can simply download zip file from github and extract it, then put file to your project library and use it like other libraries.

Just add line below to autoload files:

require_once 'path_to_library/autoloader.php';

and you are good to go.

How to use

// to instance a logger object
$logger = new Logger(new FileHandler($directory_to_store_logs));

// now use logger functions, for instance debug method
$logger->debug('this is a debug message');

Or instantiate Logger with other optional constructor parameters

Description

$logger = new Logger([$handler[, $format[, $date_format]]]);

$handler is a type of IHandler and an IHandler is an interface to extend logger for other kind of handlers and not just file handling.

Also you can set handler after initializing the logger with method handler(IHandler $handler).

To extend IHandler you must implement these functions

class CustomHandler implements IHandler
{
    /**
     * CunstomHandler constructor.
     */
    public function __construct()
    {
        // do initialize your needed things
    }

    /**
     * @return IHandler
     */
    public function init(): IHandler
    {
        // to whatever need for handler initialization
        
        return $this;
    }

    /**
     * @param string $message
     * @param array $data
     * @return bool
     */
    public function write(string $message, array $data = []): bool
    {
        // write $message with your log handler
        // $data have all parameters as key => value pairs
        
        // return true if write was OK or false if it wasn't
    }
}

$format is to format message that need to be written. Default value is {level}: {date} - {message}

$format_date is to format date of log. Default value is Y-m-d H:i:s.

Available functions

There are many functions to log your message. The order of importance of them are:

• EMERGENCY - highest level priority

• ALERT

• CRITICAL

• ERROR

• WARNING

• NOTICE

• INFO

• DEBUG - lowest level priority

// log emergency
$logger->emergency($message);

// log alert
$logger->alert($message);

// log critical
$logger->critical($message);

// log error
$logger->error($message);

// log warning
$logger->warning($message);

// log notice
$logger->notice($message);

// log info
$logger->info($message);

// log debug
$logger->debug($message);

// or you can use log function to log any level you want,
// including previous functions
$logger->log($message, LOGGER::DEBUG);
// or
$logger->log($message, 'custom level');

If you have additional data to log, then you should use extraParameters($parameter) method and modify logger format to show your parameter in log message with format($format) method.

$logger->extraParameters([
'other_parameter' => $valueOfParameter
])->format('{level} - {other_parameter} - {message}');

// now we can use log methods
$logger->log('a log message', 'custom level');

If you need to change date format, then you can use dateFormat($format) method

$logger->dateFormat('Y/m/d H:i');

If you want have a better experience with date, you should enter your timezone through setTimezone($timezone) method. Default timezone is environment default timezone.

The timezone will show with date for more information.

exp. 2020-07-25 09:46:19 (America/New_York)

$logger->setTimezone('America/New_York');

License

Under MIT license.