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php-json-logger

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LoggingLibrary for PHP. Output by JSON Format

This Library is mainly intended for use in web applications.

Getting Started

Install composer package

composer require nekonomokochan/php-json-logger

How To Use

Basic usage

<?php
use Nekonomokochan\PhpJsonLogger\LoggerBuilder;

$context = [
    'title' => 'Test',
    'price' => 4000,
    'list'  => [1, 2, 3],
    'user'  => [
        'id'   => 100,
        'name' => 'keitakn',
    ],
];

$loggerBuilder = new LoggerBuilder();
$logger = $loggerBuilder->build();
$logger->info('🐱', $context);

It is output as follows.

{
    "log_level": "INFO",
    "message": "🐱",
    "channel": "PhpJsonLogger",
    "trace_id": "35b627ce-55e0-4729-9da0-fbda2a7d817d",
    "file": "\/home\/vagrant\/php-json-logger\/tests\/LoggerTest.php",
    "line": 42,
    "context": {
        "title": "Test",
        "price": 4000,
        "list": [
            1,
            2,
            3
        ],
        "user": {
            "id": 100,
            "name": "keitakn"
        }
    },
    "remote_ip_address": "127.0.0.1",
    "server_ip_address": "127.0.0.1",
    "user_agent": "unknown",
    "datetime": "2018-06-04 17:21:03.631409",
    "timezone": "Asia\/Tokyo",
    "process_time": 631.50811195373535
}

The unit of process_time is ms(millisecond).

How to change output filepath

Default output filepath is /tmp/php-json-logger-yyyy-mm-dd.log .

If you want to change the output filepath, please set the output filepath to the builder class.

<?php
use Nekonomokochan\PhpJsonLogger\LoggerBuilder;

$fileName = '/tmp/test-php-json-logger.log';

$context = [
    'cat'    => '🐱',
    'dog'    => '🐢',
    'rabbit' => '🐰',
];

$loggerBuilder = new LoggerBuilder();
$loggerBuilder->setFileName($fileName);
$logger = $loggerBuilder->build();
$logger->info('testSetLogFileName', $context);

The output filepath is /tmp/test-php-json-logger-yyyy-mm-dd.log .

It is output as follows.

{
    "log_level": "INFO",
    "message": "testSetLogFileName",
    "channel": "PhpJsonLogger",
    "trace_id": "20f39cdb-dbd8-470c-babd-093a2974d169",
    "file": "\/home\/vagrant\/php-json-logger\/tests\/LoggerTest.php",
    "line": 263,
    "context": {
        "cat": "🐱",
        "dog": "🐢",
        "rabbit": "🐰"
    },
    "remote_ip_address": "127.0.0.1",
    "server_ip_address": "127.0.0.1",
    "user_agent": "unknown",
    "datetime": "2018-06-05 11:28:03.214995",
    "timezone": "Asia\/Tokyo",
    "process_time": 215.09790420532227
}

How to Set trace_id

Any value can be set for trace_id.

This will help you when looking for logs you want.

<?php
use Nekonomokochan\PhpJsonLogger\LoggerBuilder;

$context = [
    'name' => 'keitakn',
];

$loggerBuilder = new LoggerBuilder();
$loggerBuilder->setTraceId('MyTraceID');
$logger = $loggerBuilder->build();
$logger->info('testSetTraceIdIsOutput', $context);

It is output as follows.

{
    "log_level": "INFO",
    "message": "testSetTraceIdIsOutput",
    "channel": "PhpJsonLogger",
    "trace_id": "MyTraceID",
    "file": "\/home\/vagrant\/php-json-logger\/tests\/LoggerTest.php",
    "line": 214,
    "context": {
        "name": "keitakn"
    },
    "remote_ip_address": "127.0.0.1",
    "server_ip_address": "127.0.0.1",
    "user_agent": "unknown",
    "datetime": "2018-06-05 11:36:02.394269",
    "timezone": "Asia\/Tokyo",
    "process_time": 394.35911178588867
}

How to change logLevel

Please use \Nekonomokochan\PhpJsonLogger\LoggerBuilder::setLogLevel() .

For example, the following code does not output logs.

Because the level is set to CRITICAL.

<?php
use Nekonomokochan\PhpJsonLogger\LoggerBuilder;

$context = [
    'cat'    => '🐱',
    'dog'    => '🐢',
    'rabbit' => '🐰',
];

$loggerBuilder = new LoggerBuilder();
$loggerBuilder->setLogLevel(LoggerBuilder::CRITICAL);
$logger = $loggerBuilder->build();
$logger->info('testSetLogLevel', $context);

You can set the following values for logLevel .

These are the same as logLevel defined in Monolog.

  • DEBUG = 100
  • INFO = 200
  • NOTICE = 250
  • WARNING = 300
  • ERROR = 400
  • CRITICAL = 500
  • ALERT = 550
  • EMERGENCY = 600

How to change channel

Default channel is PhpJsonLogger.

If you want to change the channel, you can change it with the following code.

$loggerBuilder = new LoggerBuilder();
$loggerBuilder->setChannel('My Favorite Animals');

For example, the output is as follows.

{
    "log_level": "INFO",
    "message": "testCanSetChannel",
    "channel": "My Favorite Animals",
    "trace_id": "4b8aa070-a533-4376-9bf5-270c8fcc6d87",
    "file": "\/home\/vagrant\/php-json-logger\/tests\/Logger\/LoggerTest.php",
    "line": 347,
    "context": {
        "animals": "🐱🐢🐰🐱🐹"
    },
    "remote_ip_address": "127.0.0.1",
    "server_ip_address": "127.0.0.1",
    "user_agent": "unknown",
    "datetime": "2018-06-07 17:56:48.538117",
    "timezone": "Asia\/Tokyo",
    "process_time": 538.48695755004883
}

How to change Log Rotation Date

This is the default setting to save logs for 7 days.

If you want to change the log Rotation date, you can change it with the following code.

The following code sets the log retention period to 2 days.

$loggerBuilder = new LoggerBuilder();
$loggerBuilder->setMaxFiles(2);

Extend and use \Nekonomokochan\PhpJsonLogger\JsonFormatter

You can make your own \Monolog\Logger using only \Nekonomokochan\PhpJsonLogger\JsonFormatter.

This method is useful when you need \Monolog\Logger in web application framework(e.g. Laravel).

The following is sample code.

<?php
use Monolog\Logger;
use Monolog\Handler\RotatingFileHandler;
use Monolog\Processor\IntrospectionProcessor;
use Nekonomokochan\PhpJsonLogger\JsonFormatter;

$logFileName = '/tmp/extended-monolog-test.log';

// create extendedMonolog Instance
$formatter = new JsonFormatter();

$rotating = new RotatingFileHandler(
    $logFileName,
    7,
    Logger::INFO
);
$rotating->setFormatter($formatter);

$introspection = new IntrospectionProcessor(
    Logger::INFO,
    ['Nekonomokochan\\PhpJsonLogger\\'],
    0
);

$extraRecords = function ($record) {
    $record['extra']['trace_id'] = 'ExtendedMonologTestTraceId';
    $record['extra']['created_time'] = microtime(true);

    return $record;
};

$extendedMonolog = new Logger(
    'ExtendedMonolog',
    [$rotating],
    [$introspection, $extraRecords]
);

// output info log
$context = [
    'cat'    => '🐱',
    'dog'    => '🐢',
    'rabbit' => '🐰',
];

$extendedMonolog->info('outputInfoLogTest', $context);

It is output to extended-monolog-test-yyyy-mm-dd.log as follows

{
    "log_level": "INFO",
    "message": "outputInfoLogTest",
    "channel": "ExtendedMonolog",
    "trace_id": "ExtendedMonologTestTraceId",
    "file": "\/home\/vagrant\/php-json-logger\/tests\/ExtendedMonologTest.php",
    "line": 85,
    "context": {
        "cat": "🐱",
        "dog": "🐢",
        "rabbit": "🐰"
    },
    "remote_ip_address": "127.0.0.1",
    "server_ip_address": "127.0.0.1",
    "user_agent": "unknown",
    "datetime": "2018-06-06 17:14:26.042013",
    "timezone": "Asia\/Tokyo",
    "process_time": 0.1678466796875
}

The following code is necessary to output trace_id and process_time.

<?php
$extraRecords = function ($record) {
    $record['extra']['trace_id'] = 'ExtendedMonologTestTraceId';
    $record['extra']['created_time'] = microtime(true);

    return $record;
};

The code below is the code necessary to normally display the stack trace with JSON.

<?php
$introspection = new IntrospectionProcessor(
    Logger::INFO,
    ['Nekonomokochan\\PhpJsonLogger\\'],
    0
);

To output the stack trace to the log, execute the following code.

<?php
$exception = new \Exception('ExtendedMonologTest.outputErrorLog', 500);
$context = [
    'cat'    => '🐱(=^・^=)🐱',
    'dog'    => '🐢Uoο½₯ο½ͺο½₯oU🐢',
    'rabbit' => '🐰🐰🐰',
];

$extendedMonolog->error(
    get_class($exception),
    $this->formatPhpJsonLoggerErrorsContext($exception, $context)
);

Please pay attention to the part $this->formatPhpJsonLoggerErrorsContext($exception, $context).

This is necessary processing to format the error log into JSON and output it.

This is the method implemented in \Nekonomokochan\PhpJsonLogger\ErrorsContextFormat.

It is output to extended-monolog-test-yyyy-mm-dd.log as follows.

If you want to know more detailed usage, please look at php-json-logger/tests/ExtendedMonologTest.php.

{
    "log_level": "ERROR",
    "message": "Exception",
    "channel": "PhpJsonLogger",
    "trace_id": "ExtendedMonologTestTraceId",
    "file": "\/home\/vagrant\/php-json-logger\/tests\/ExtendedMonologTest.php",
    "line": 126,
    "context": {
        "cat": "🐱(=^・^=)🐱",
        "dog": "🐢Uoο½₯ο½ͺο½₯oU🐢",
        "rabbit": "🐰🐰🐰"
    },
    "remote_ip_address": "127.0.0.1",
    "server_ip_address": "127.0.0.1",
    "user_agent": "unknown",
    "datetime": "2018-06-06 17:37:57.440757",
    "timezone": "Asia\/Tokyo",
    "process_time": 0.16093254089355469,
    "errors": {
        "message": "ExtendedMonologTest.outputErrorLog",
        "code": 500,
        "file": "\/home\/vagrant\/php-json-logger\/tests\/ExtendedMonologTest.php",
        "line": 117,
        "trace": [
            "#0 \/home\/vagrant\/php-json-logger\/vendor\/phpunit\/phpunit\/src\/Framework\/TestCase.php(1145): Nekonomokochan\\Tests\\ExtendedMonologTest->outputErrorLog()",
            "#1 \/home\/vagrant\/php-json-logger\/vendor\/phpunit\/phpunit\/src\/Framework\/TestCase.php(840): PHPUnit\\Framework\\TestCase->runTest()",
            "#2 \/home\/vagrant\/php-json-logger\/vendor\/phpunit\/phpunit\/src\/Framework\/TestResult.php(645): PHPUnit\\Framework\\TestCase->runBare()",
            "#3 \/home\/vagrant\/php-json-logger\/vendor\/phpunit\/phpunit\/src\/Framework\/TestCase.php(798): PHPUnit\\Framework\\TestResult->run()",
            "#4 \/home\/vagrant\/php-json-logger\/vendor\/phpunit\/phpunit\/src\/Framework\/TestSuite.php(776): PHPUnit\\Framework\\TestCase->run()",
            "#5 \/home\/vagrant\/php-json-logger\/vendor\/phpunit\/phpunit\/src\/TextUI\/TestRunner.php(529): PHPUnit\\Framework\\TestSuite->run()",
            "#6 \/home\/vagrant\/php-json-logger\/vendor\/phpunit\/phpunit\/src\/TextUI\/Command.php(198): PHPUnit\\TextUI\\TestRunner->doRun()",
            "#7 \/home\/vagrant\/php-json-logger\/vendor\/phpunit\/phpunit\/src\/TextUI\/Command.php(151): PHPUnit\\TextUI\\Command->run()",
            "#8 \/home\/vagrant\/php-json-logger\/vendor\/phpunit\/phpunit\/phpunit(53): PHPUnit\\TextUI\\Command::main()"
        ]
    }
}

Notification To Slack

To send the log to Slack please execute the following code.

This code will be sent to slack if the log level is CRITICAL or higher.

<?php
use Nekonomokochan\PhpJsonLogger\LoggerBuilder;
use Nekonomokochan\PhpJsonLogger\SlackHandlerBuilder;

$exception = new \Exception('TestException', 500);
$context = [
    'name'  => 'keitakn',
    'email' => '[email protected]',
];

$slackToken = 'YOUR_SLACK_TOKEN';
$slackChannel = 'YOUR_SLACK_CHANNEL';

$slackHandlerBuilder = new SlackHandlerBuilder($slackToken, $slackChannel);
$slackHandlerBuilder->setLevel(LoggerBuilder::CRITICAL);

$loggerBuilder = new LoggerBuilder();
$loggerBuilder->setFileName($this->outputFileBaseName);
$loggerBuilder->setSlackHandler($slackHandlerBuilder->build());
$logger = $loggerBuilder->build();
$logger->critical($exception, $context);

Use in Docker

Please use LoggerBuilder.setUseInDocker in order to use it on Docker.

When setUseInDocker is set to true, no file output is done and the log is output as stdout.

<?php
use Nekonomokochan\PhpJsonLogger\LoggerBuilder;

$exception = new \Exception('TestException', 500);
$context = [
    'name'  => 'keitakn',
    'email' => '[email protected]',
];

$loggerBuilder = new LoggerBuilder();
$loggerBuilder->setFileName($this->outputFileBaseName);
$loggerBuilder->setUseInDocker(true);
$logger = $loggerBuilder->build();
$logger->critical($exception, $context);

Caution

\Nekonomokochan\PhpJsonLogger\Logger is a subclass that extends \Monolog\Logger

You can use it like \Monolog\Logger.

However, for the following methods, you can pass only classes that extend \Exception or \Error as arguments.

  • \Nekonomokochan\PhpJsonLogger\Logger::error()
  • \Nekonomokochan\PhpJsonLogger\Logger::critical()
  • \Nekonomokochan\PhpJsonLogger\Logger::alert()
  • \Nekonomokochan\PhpJsonLogger\Logger::emergency()

In case of violation, \Nekonomokochan\PhpJsonLogger\Logger will Throw \Nekonomokochan\PhpJsonLogger\InvalidArgumentException

License

MIT

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LoggingLibrary for PHP. Output by JSON Format

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php php7 php-library monolog logger psr-3

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