Colored LineFormatter for Monolog

A simple Formatter that adds level-dependant colors to your logs.

Installation

Install through composer:

$ composer require gfaugere/monolog-colored-line

Basic usage

Use it the same way you would use a Monolog\LineFormatter:

<?php

use Monolog\Logger;
use Monolog\Handler\StreamHandler;
use gfaugere\Monolog\Formatter\ColoredLineFormatter;

$formatter = new ColoredLineFormatter();

// Create a handler
$stream = new StreamHandler(__DIR__.'/my_app.log', Logger::DEBUG);
// Don't forget to attach your new formatter
$stream->setFormatter($formatter);
// Create a log channel
$log = new Logger('name');
$log->pushHandler($stream);

// Add records as usual
$log->warning('Foo');
$log->error('Bar');

Default colors

This is what your logs will look like:

Customize the format

By default, the %level_name% will be wrapped in colors. You can chose what is colored using the new %color_start% and %color_end% variables in your format:

This example uses "%color_start%[%datetime%] %channel%.%level_name%:%color_end% %message% %context% %extra%\n" as a format.

If you want to use several %level_name% and only color the first one, you can set $colorMode to ColoredLineFormatter::MODE_COLOR_LEVEL_FIRST so that only the first occurrence is formatted.

Customize the scheme

You can chose your own color scheme:

<?php

use Monolog\Logger;
use Monolog\Handler\StreamHandler;
use gfaugere\Monolog\Formatter\ColoredLineFormatter;

$format = "[%datetime%] %color_start%%channel%.%level_name%: %message%%color_end% %context% %extra%\n";
$scheme = [
    Logger::DEBUG     => "\033[38;5;206m",
    Logger::INFO      => "\033[38;5;196m",
    Logger::NOTICE    => "\033[38;5;202m",
    Logger::WARNING   => "\033[38;5;226m",
    Logger::ERROR     => "\033[38;5;34m",
    Logger::CRITICAL  => "\033[38;5;81m",
    Logger::ALERT     => "\033[38;5;53m",
    Logger::EMERGENCY => "\033[38;5;129m"
];

$formatter = new ColoredLineFormatter($format, null, false, false, $scheme);

// Create a handler
$stream = new StreamHandler(__DIR__.'/my_app.log', Logger::DEBUG);
// Don't forget to attach your new formatter
$stream->setFormatter($formatter);
// Create a log channel
$log = new Logger('name');
$log->pushHandler($stream);

// Add records as usual
$log->warning('Foo');
$log->error('Bar');

This formatter doesn't perform any kind of checks or validation of sequences. You can use whatever your terminal supports!

About

Requirements

Supports Monolog ^2.0, which works with PHP 7.2 or above