Simple Logger

A simple PSR-3 compliant PHP logging library.

Installation

composer require donchev/simple-logger

Simple Usage

<?php

require_once __DIR__ . '/vendor/autoload.php';

$logger = new \Donchev\Log\Loggers\FileLogger('file.log');

$logger->debug('Log me');

Output

[2021-03-18 10:03:11 CET] [DEBUG]: Log me 

Advanced usage

<?php

require_once __DIR__ . '/vendor/autoload.php';

$config = [
    'line_format' => '[%s] [%s]: %s %s',
    'date_format' => 'Y-m-d H:i:s T',
    'file_prefix' => 'pre_',
    'include_context' => true,
    'log_json' => false,
    'include_stack_trace' => true,
];

$logger = new \Donchev\Log\Loggers\FileLogger('file.log', \Psr\Log\LogLevel::INFO, $config);

$logger->debug('This message will not be logged in');
$logger->info(
    'Some cool message',
    [
        'Additional info' => 'I am the additional info',
        'An array of info' => [
            'Key A' => 'Content',
            'Key B' => [1, 2, 3]
        ],
        'An object' => new DateTime(),
    ]
);

$logger->log(
    \Psr\Log\LogLevel::WARNING,
    'Some cool warning here',
    [
        'exception' => new RuntimeException('Just happened')
    ]
);

Output:

[2021-03-18 10:01:20 CET] [INFO]: Some cool message 
Context:
(
    [Additional info] => I am the additional info
    [An array of info] => Array
        (
            [Key A] => Content
            [Key B] => Array
                (
                    [0] => 1
                    [1] => 2
                    [2] => 3
                )

        )

    [An object] => DateTime Object
        (
            [date] => 2021-03-18 10:01:20.256324
            [timezone_type] => 3
            [timezone] => Europe/Berlin
        )

)
[2021-03-18 10:01:20 CET] [WARNING]: Some cool warning here 
Context:
(
    [exception] => RuntimeException: Just happened in C:\dev\simple-logger-test\index.php:24
Stack trace:
#0 {main}
)

Available Loggers

There are 5 different logger classes to chose from:

\Donchev\Log\Loggers\FileLogger
\Donchev\Log\Loggers\OutputLogger
\Donchev\Log\Loggers\StdOutLogger
\Donchev\Log\Loggers\StdErrLogger
\Donchev\Log\Loggers\NullLogger

Minimum logging level

You can set a minimum logging level through the constructor - passing a Psr\Log\LogLevel as an argument. If set, messages with lower level priority will not be logged.

Log levels priorities:

LogLevel::EMERGENCY => 7,
LogLevel::ALERT => 6,
LogLevel::CRITICAL => 5,
LogLevel::ERROR => 4,
LogLevel::WARNING => 3,
LogLevel::NOTICE => 2,
LogLevel::INFO => 1,
LogLevel::DEBUG => 0,

Log message interpolation

You can use placeholders in your messages as described in the PSR-3 standard.

Example:

$logger = new FileLogger('file.log');
$logger->info(
    'Here comes the placeholder: {foo}!',
    ['foo' => 'Hi there from within the context']
);

Output:

[2021-03-18 10:43:56 CET] [INFO]: Here comes the placeholder: Hi there from within the context! 
Context:
(
    [foo] => Hi there from within the context
)

Logger Options

You can pass an array of options through the constructor.

Example:

$logger = new \Donchev\Log\Loggers\OutputLogger(\Psr\Log\LogLevel::WARNING, [
    'file_prefix' => '',
    'include_context' => true,
    'log_json' => false,
    'one_line_log' => true,
]);

Available options

Author

Donchev

License

The MIT License (MIT)

Copyright (c) 2021 Donchev

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.