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Syntax.php (1471B)

      1 <?php
      2 
      3 /*
      4  * This file is part of Twig.
      5  *
      6  * (c) 2009 Fabien Potencier
      7  * (c) 2009 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 /**
     14  * Exception thrown when a syntax error occurs during lexing or parsing of a template.
     15  *
     16  * @author Fabien Potencier <fabien@symfony.com>
     17  */
     18 class Twig_Error_Syntax extends Twig_Error
     19 {
     20     /**
     21      * Tweaks the error message to include suggestions.
     22      *
     23      * @param string $name  The original name of the item that does not exist
     24      * @param array  $items An array of possible items
     25      */
     26     public function addSuggestions($name, array $items)
     27     {
     28         if (!$alternatives = self::computeAlternatives($name, $items)) {
     29             return;
     30         }
     31 
     32         $this->appendMessage(sprintf(' Did you mean "%s"?', implode('", "', $alternatives)));
     33     }
     34 
     35     /**
     36      * @internal
     37      *
     38      * To be merged with the addSuggestions() method in 2.0.
     39      */
     40     public static function computeAlternatives($name, $items)
     41     {
     42         $alternatives = array();
     43         foreach ($items as $item) {
     44             $lev = levenshtein($name, $item);
     45             if ($lev <= strlen($name) / 3 || false !== strpos($item, $name)) {
     46                 $alternatives[$item] = $lev;
     47             }
     48         }
     49         asort($alternatives);
     50 
     51         return array_keys($alternatives);
     52     }
     53 }