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   1  <?php
   2  
   3  /*
   4   * This file is part of Twig.
   5   *
   6   * (c) Fabien Potencier
   7   * (c) Armin Ronacher
   8   *
   9   * For the full copyright and license information, please view the LICENSE
  10   * file that was distributed with this source code.
  11   */
  12  
  13  namespace Twig\Error;
  14  
  15  /**
  16   * \Exception thrown when a syntax error occurs during lexing or parsing of a template.
  17   *
  18   * @author Fabien Potencier <fabien@symfony.com>
  19   */
  20  class SyntaxError extends Error
  21  {
  22      /**
  23       * Tweaks the error message to include suggestions.
  24       *
  25       * @param string $name  The original name of the item that does not exist
  26       * @param array  $items An array of possible items
  27       */
  28      public function addSuggestions($name, array $items)
  29      {
  30          $alternatives = [];
  31          foreach ($items as $item) {
  32              $lev = levenshtein($name, $item);
  33              if ($lev <= \strlen($name) / 3 || false !== strpos($item, $name)) {
  34                  $alternatives[$item] = $lev;
  35              }
  36          }
  37  
  38          if (!$alternatives) {
  39              return;
  40          }
  41  
  42          asort($alternatives);
  43  
  44          $this->appendMessage(sprintf(' Did you mean "%s"?', implode('", "', array_keys($alternatives))));
  45      }
  46  }
  47  
  48  class_alias('Twig\Error\SyntaxError', 'Twig_Error_Syntax');