How to use logging in ThinkPHP6

With the rapid development of the Internet and Web applications, log management is becoming more and more important. When developing web applications, how to find and locate problems is a very critical issue. A logging system is a very effective tool that can help us achieve these tasks. ThinkPHP6 provides a powerful logging system that can help application developers better manage and track events that occur in applications.

This article will introduce how to use the logging system in ThinkPHP6 and how to use the logging system to better debug and manage applications.

1. ThinkPHP6’s logging system

ThinkPHP6’s logging system is implemented through the Monolog library. Monolog is a PHP logging library that can record log information to different places, such as files, databases, SMTP servers, etc.

Using Monolog in ThinkPHP6 can realize log management very conveniently. By default, ThinkPHP6 uses a file logger to record log information to the log folder in the runtime directory of the project, and store them separately with the date as the file name. We can make some custom settings in the configuration file, such as changing the storage directory, changing the log level, selecting a different recording processor, and so on.

2. Use cases

In the previous development process, sometimes problems were encountered that were difficult to locate. At this time, we can use the log system to record the status of system operation and other important information, and locate problems. More convenient. The following is a brief introduction to the use of logs.

(1) Logging

In ThinkPHP6, Monolog divides the log levels into the following levels:

• DEBUG: Detailed debug information.
• INFO: Meaningful event information, such as user login.
• WARNING: There is warning event information, but it does not affect the system.
• ERROR: An error occurred in the system, but it does not affect the continued operation of the system.
• CRITICAL: A critical error occurred in the system and the system cannot continue to run.
• ALERT: Error for which immediate action should be taken, for example the database is unavailable.
• EMERGENCY: The system cannot run because the core components do not exist or are incorrectly configured.

Logging is accomplished through the log facade class Log. You can use the facade class Log to record in controllers, models, middleware, etc. A series of available log level methods have been defined in the interface of the facade class, and we only need to call them.

For example:

use thinkacadeLog;

Log::error('This is an error message.');
Log::warning('This is a warning message.');
Log::info('This is an information message.');

(2) Check the log

During the development process, we may need to check the log information to facilitate us to find problems in the program. You can view the logs in the following ways:

• View through log files: You can find the recorded log files in the log folder under the runtime directory of the project, and view the log information through tools such as a text editor.
• View through the console: You can enter the following command in the terminal to view the log information:

php think list log

(3) Custom recording processor

ThinkPHP6 provides some default Log processors, such as file processors, Logentries processors, etc. We can also customize record processors to meet specific needs.

For example, we can create a processor that records to cloud storage:

use MonologHandlerAbstractProcessingHandler;

class CloudStorageHandler extends AbstractProcessingHandler
{
    public function __construct()
    {
        // 连接云存储，初始化操作
    }

    protected function write(array $record): void
    {
        // 将记录写入到云存储中
    }

    // 其他自定义方法
}

Next, we need to register this processor in the configuration file:

'handlers' => [
    'cloud_storage' => [
        'class'   => pploghandlerCloudStorageHandler::class,
    ],
],

'channels' => [
    'default' => [
        'handlers' => ['cloud_storage'],
    ],
],

At this point, we can use the registered processor in the application:

Log::channel('cloud_storage')->info('This is an information message.');

3. Summary

This article introduces how to use the ThinkPHP6 log system to record system running status and important information , and how to use the log system for debugging when locating problems. It also explains how to customize the record processor to meet specific needs. I hope this article can help readers better use the logging system in ThinkPHP6.

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