vendor/twig/twig/lib/Twig/Node/SandboxedPrint.php

   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 __construct(Twig_Node_Expression $expr, $lineno, $tag = null)
  25     {
  26         parent::__construct($expr, $lineno, $tag);
  27     }
  28
  29     /**
  30      * Compiles the node to PHP.
  31      *
  32      * @param Twig_Compiler A Twig_Compiler instance
  33      */
  34     public function compile(Twig_Compiler $compiler)
  35     {
  36         $compiler
  37             ->addDebugInfo($this)
  38             ->write('echo $this->env->getExtension(\'sandbox\')->ensureToStringAllowed(')
  39             ->subcompile($this->getNode('expr'))
  40             ->raw(");\n")
  41         ;
  42     }
  43
  44     /**
  45      * Removes node filters.
  46      *
  47      * This is mostly needed when another visitor adds filters (like the escaper one).
  48      *
  49      * @param Twig_Node $node A Node
  50      */
  51     protected function removeNodeFilter($node)
  52     {
  53         if ($node instanceof Twig_Node_Expression_Filter) {
  54             return $this->removeNodeFilter($node->getNode('node'));
  55         }
  56
  57         return $node;
  58     }
  59 }