PHP 中的日志记录配置和自定义

use Monolog\Logger;
use Monolog\Handler\StreamHandler;

// 创建Logger实例
$logger = new Logger('my_logger');

// 为Logger添加Handler
$logger->pushHandler(new StreamHandler('app.log', Logger::WARNING));

class MyLogger {
    private $logger;

    public function __construct() {
        $this->logger = new Logger('my_logger');
        $this->logger->pushHandler(new MyHandler());
    }

    public function log($level, $message, array $context = []) {
        $this->logger->log($level, $message, $context);
    }
}

class MyHandler extends StreamHandler {
    public function write(array $record) {
        // 自定义日志格式
        $log = sprintf(
            "[%s] %s: %s",
            $record['datetime']->format('Y-m-d H:i:s'),
            $record['level_name'],
            $record['message']
        );

        // 自定义输出行为
        echo $log . PHP_EOL;
    }
}

$logger = new MyLogger();

if ($user->login()) {
    $logger->info('User logged in', ['user' => $user->getUsername()]);
} else {
    $logger->error('User login failed', ['user' => $user->getUsername()]);
}

[2023-02-28 13:30:15] INFO: User logged in: john
[2023-02-28 13:30:15] ERROR: User login failed: jane