text: <?php
  /*
   * This file is part of PharIo\Manifest.
   *
   * (c) Arne Blankerts <arne@blankerts.de>, Sebastian Heuer <sebastian@phpeople.de>, Sebastian Bergmann <sebastian@phpunit.de>
   *
   * For the full copyright and license information, please view the LICENSE
   * file that was distributed with this source code.
   */
  
  namespace PharIo\Manifest;
  
  class PhpExtensionRequirement implements Requirement {
      /**
       * @var string
       */
      private $extension;
  
      /**
       * @param string $extension
       */
      public function __construct($extension) {
          $this->extension = $extension;
      }
  
      /**
       * @return string
       */
      public function __toString() {
          return $this->extension;
      }
  }
  