PHP 8.4の直感的なエラーハンドリング – コードの信頼性を向上

try {
    $result = riskyOperation();
} catch (Exception $e) {
    echo $e->getMessage();
}

try {
    operationA();
} catch (Exception $e) {
    throw new RuntimeException("Operation A failed", 0, $e);
}

class CustomException extends Exception {}

try {
    throw new CustomException("A custom error occurred");
} catch (CustomException $e) {
    echo "Handled: " . $e->getMessage();
}

class Resource {
    public function __construct($config) {
        if (!$config) {
            throw new InvalidArgumentException("Invalid configuration provided");
        }
    }
}

try {
    process();
} catch (Exception $e) {
    // ログ処理
    throw $e;
}

set_exception_handler(function($e) {
    error_log($e->getMessage());
    echo "An unexpected error occurred.";
});

function calculate(int $a, int $b): int {
    if ($b === 0) {
        throw new DivisionByZeroError("Division by zero");
    }
    return $a / $b;
}

function logError(Throwable $e): void {
    file_put_contents("errors.log", $e->getMessage() . PHP_EOL, FILE_APPEND);
}

async function fetchData() {
    try {
        $data = await fetch("https://example.com/api");
    } catch (Exception $e) {
        echo "Error: " . $e->getMessage();
    }
}

class ErrorHandlerTest extends PHPUnit\Framework\TestCase {
    public function testDivisionByZero() {
        $this->expectException(DivisionByZeroError::class);
        calculate(10, 0);
    }
}