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<?php
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/*
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* This file is part of Twig.
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*
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* (c) 2009 Fabien Potencier
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* (c) 2009 Armin Ronacher
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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/**
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* Exception thrown when a syntax error occurs during lexing or parsing of a template.
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*
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* @author Fabien Potencier <fabien@symfony.com>
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*/
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class Twig_Error_Syntax extends Twig_Error
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{
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/**
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* Tweaks the error message to include suggestions.
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*
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* @param string $name The original name of the item that does not exist
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* @param array $items An array of possible items
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*/
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public function addSuggestions($name, array $items)
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{
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if (!$alternatives = self::computeAlternatives($name, $items)) {
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return;
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}
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$this->appendMessage(sprintf(' Did you mean "%s"?', implode('", "', $alternatives)));
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}
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/**
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* @internal
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*
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* To be merged with the addSuggestions() method in 2.0.
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*/
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public static function computeAlternatives($name, $items)
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{
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$alternatives = array();
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foreach ($items as $item) {
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$lev = levenshtein($name, $item);
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if ($lev <= strlen($name) / 3 || false !== strpos($item, $name)) {
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$alternatives[$item] = $lev;
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}
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}
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asort($alternatives);
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return array_keys($alternatives);
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}
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}
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