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SandboxedPrint.php (1425B)

      1 <?php
      2 
      3 /*
      4  * This file is part of Twig.
      5  *
      6  * (c) 2010 Fabien Potencier
      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 /**
     13  * Twig_Node_SandboxedPrint adds a check for the __toString() method
     14  * when the variable is an object and the sandbox is activated.
     15  *
     16  * When there is a simple Print statement, like {{ article }},
     17  * and if the sandbox is enabled, we need to check that the __toString()
     18  * method is allowed if 'article' is an object.
     19  *
     20  * @author Fabien Potencier <fabien@symfony.com>
     21  */
     22 class Twig_Node_SandboxedPrint extends Twig_Node_Print
     23 {
     24     public function compile(Twig_Compiler $compiler)
     25     {
     26         $compiler
     27             ->addDebugInfo($this)
     28             ->write('echo $this->env->getExtension(\'sandbox\')->ensureToStringAllowed(')
     29             ->subcompile($this->getNode('expr'))
     30             ->raw(");\n")
     31         ;
     32     }
     33 
     34     /**
     35      * Removes node filters.
     36      *
     37      * This is mostly needed when another visitor adds filters (like the escaper one).
     38      *
     39      * @param Twig_Node $node A Node
     40      *
     41      * @return Twig_Node
     42      */
     43     protected function removeNodeFilter($node)
     44     {
     45         if ($node instanceof Twig_Node_Expression_Filter) {
     46             return $this->removeNodeFilter($node->getNode('node'));
     47         }
     48 
     49         return $node;
     50     }
     51 }