Обновление и установка композитора класса php

Question

Я пытаюсь разработать класс для установки или обновления всего или одного или нескольких librray.Но я заблокирован.

Я пытался начать с этого поста: Запустить композитор с помощью PHP-скрипта в браузере

Моя структура

/Shop/
/Shop/composer.json
/Shop/composer.lock

/Shop/includes/External/Vendor
/Shop/includes/Core

Примечание: все библиотеки находятся внутри /Shop/includes/External/Vendor

Класс, который я пытаюсь создать, позволяет мне установить библиотеку или обновить все или одну библиотеку

    namespace Site\SiteAdmin;

      use Site\Core;

      use Composer\Console\Application;
      use Symfony\Component\Console\Input\ArrayInput;

      class Composer {
        const EXTRACT_DIRECTORY = BASE_DIR . 'External';

        public static function ComposerUpdate($libray = null) {

         if (is_null(libray) { 
          if (file_exists(static::EXTRACT_DIRECTORY.'/vendor/autoload.php') == true) {
            echo 'Extracted autoload already exists. Skipping phar extraction as presumably it\'s already extracted.';
          } else{
            $composerPhar = new Phar('Composer.phar');
            //php.ini setting phar.readonly must be set to 0
            $composerPhar->extractTo(static::EXTRACT_DIRECTORY);
          }

    //This requires the phar to have been extracted successfully.
          require_once (static::EXTRACT_DIRECTORY . '/vendor/autoload.php');

          chdir(Core::getConfig('dir_root', 'Shop'));
    //Create the commands
          $input = new ArrayInput(['command' => 'update']);


    //Create the application and run it with the commands
          $application = new Application();
          try {

            $application->setAutoExit(false); // prevent `$application->run` method from exitting the script
            $application->run($input);

          } catch (\Exception $e) {
            var_dump($e);
          }
         } else {
           // update libray like phpmailer for example
         }
        }


// how to make this function to install a specific library like phpmailer for example

        public function ComposerInstall($library) {
          if (file_exists(static::EXTRACT_DIRECTORY.'/vendor/autoload.php') == true) {
            echo "Extracted autoload already exists. Skipping phar extraction as presumably it's already extracted.";
          } else{
            $composerPhar = new Phar("Composer.phar");
            //php.ini setting phar.readonly must be set to 0
            $composerPhar->extractTo(static::EXTRACT_DIRECTORY);
          }

    //This requires the phar to have been extracted successfully.
          require_once (static::EXTRACT_DIRECTORY.'/vendor/autoload.php');

    // change out of the webroot so that the vendors file is not created in
    // a place that will be visible to the intahwebz
          chdir(Core::getConfig('dir_root', 'Shop'));


    // call `composer install` command programmatically
          $input = new ArrayInput(array('command' => 'install'));
          $application = new Application();
          $application->setAutoExit(false); // prevent `$application->run` method from exitting the script
          $application->run($input);

          echo "Done.";
        }

      }