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   1  <?php
   2  
   3  /*
   4   * This file is part of the Symfony package.
   5   *
   6   * (c) Fabien Potencier <fabien@symfony.com>
   7   *
   8   * For the full copyright and license information, please view the LICENSE
   9   * file that was distributed with this source code.
  10   */
  11  
  12  namespace Symfony\Component\DependencyInjection;
  13  
  14  use Symfony\Component\ExpressionLanguage\ExpressionFunction;
  15  use Symfony\Component\ExpressionLanguage\ExpressionFunctionProviderInterface;
  16  
  17  /**
  18   * Define some ExpressionLanguage functions.
  19   *
  20   * To get a service, use service('request').
  21   * To get a parameter, use parameter('kernel.debug').
  22   *
  23   * @author Fabien Potencier <fabien@symfony.com>
  24   */
  25  class ExpressionLanguageProvider implements ExpressionFunctionProviderInterface
  26  {
  27      private $serviceCompiler;
  28  
  29      public function __construct(callable $serviceCompiler = null)
  30      {
  31          $this->serviceCompiler = $serviceCompiler;
  32      }
  33  
  34      public function getFunctions()
  35      {
  36          return [
  37              new ExpressionFunction('service', $this->serviceCompiler ?: function ($arg) {
  38                  return sprintf('$this->get(%s)', $arg);
  39              }, function (array $variables, $value) {
  40                  return $variables['container']->get($value);
  41              }),
  42  
  43              new ExpressionFunction('parameter', function ($arg) {
  44                  return sprintf('$this->getParameter(%s)', $arg);
  45              }, function (array $variables, $value) {
  46                  return $variables['container']->getParameter($value);
  47              }),
  48          ];
  49      }
  50  }