Print Symfony services array with configuration to to plain PHP file format using nikic/php-parser
composer require symplify/php-config-printer --devRegister config in your services:
use Symfony\Component\DependencyInjection\Loader\Configurator\ContainerConfigurator;
use Symplify\PhpConfigPrinter\ValueObject\PhpConfigPrinterConfig;
return static function (ContainerConfigurator $containerConfigurator): void {
    $containerConfigurator->import(PhpConfigPrinterConfig::FILE_PATH);
};use Symplify\PhpConfigPrinter\Printer\SmartPhpConfigPrinter;
/** @var SmartPhpConfigPrinter $smartConfigPrinter */
$config = [
    'SomeService' => [
        'key' => 'value',
    ],
];
$smartConfigPrinter->printConfiguredServices($config);use Symplify\ConfigTransformer\Converter\YamlToPhpConverter;
class SomeClass
{
    /**
     * @var YamlToPhpConverter
     */
    private $yamlToPhpConverter;
    public function __construct(YamlToPhpConverter $yamlToPhpConverter)
    {
        $this->yamlToPhpConverter = $yamlToPhpConverter;
    }
    public function run(): void
    {
        $phpFileContent = $this->yamlToPhpConverter->convertYamlArray([
            'parameters' => [
                'key' => 'value',
            ],
            'services' => [
                '_defaults' => [
                    'autowire' => true,
                    'autoconfigure' => true,
                ],
            ],
        ]);
        // dump the $phpFileContent file
        // ...
    }
}