How to use Phalcon's logging functionality?

@kadin 

Phalcon offers a flexible and powerful logging system that can be used to keep track of application errors, events, messages, and more. Here are the steps to use Phalcon's logging functionality:

1. Load the logger component by adding it to your project's services:

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use PhalconLogger;
use PhalconLoggerAdapterFile as FileAdapter;

$di->setShared(
    'logger',
    function () {
        return new FileAdapter(
            __DIR__ . '/logs/application.log'
        );
    }
);

This code creates a logger instance that writes log messages to the application.log file in the /logs folder.

1. Use the logger to log messages in your application code:

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use PhalconLogger;

// ...

// Log an error message
$this->logger->error("Something went wrong!");

// Log an informational message
$this->logger->info("The application started.");

This code demonstrates how to log error and informational messages using the logger instance.

You can also log messages with different severity levels such as debug, warning, and critical. To do this, use the appropriate method for the severity level:

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// Log a debug message
$this->logger->debug("Got this far!");

// Log a warning message
$this->logger->warning("Careful!");

// Log a critical message
$this->logger->critical("Abort, abort!");

1. Customize the logger configuration as needed:

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use PhalconLogger;
use PhalconLoggerAdapterFile as FileAdapter;
use PhalconLoggerFormatterLine as LineFormatter;

$di->setShared(
    'logger',
    function () {
        $logger = new FileAdapter(
            __DIR__ . '/logs/application.log'
        );

        $logger->setFormatter(new LineFormatter("[%date%][%type%] %message%"));

        return $logger;
    }
);

This code customizes the logger instance by setting a different log message format using the LineFormatter class.

Phalcon's logging functionality is a powerful tool that can help you keep track of your application's behavior and diagnose problems. By configuring the logger to suit your application's needs, you can create a powerful tool to help you build and maintain robust, reliable applications.