<?php
  /**
   * @package dompdf
   * @link    http://www.dompdf.com/
   * @author  Benj Carson <benjcarson@digitaljunkies.ca>
   * @license http://www.gnu.org/copyleft/lesser.html GNU Lesser General Public License
   * @version $Id: php_evaluator.cls.php 448 2011-11-13 13:00:03Z fabien.menager $
   */
  
  /**
   * Executes inline PHP code during the rendering process
   *
   * @access private
   * @package dompdf
   */
  class PHP_Evaluator {
    
    /**
     * @var Canvas
     */
    protected $_canvas;
  
    function __construct(Canvas $canvas) {
      $this->_canvas = $canvas;
    }
  
    function evaluate($code, $vars = array()) {
      if ( !DOMPDF_ENABLE_PHP )
        return;
      
      // Set up some variables for the inline code
      $pdf = $this->_canvas;
      $PAGE_NUM = $pdf->get_page_number();
      $PAGE_COUNT = $pdf->get_page_count();
      
      // Override those variables if passed in
      foreach ($vars as $k => $v) {
        $$k = $v;
      }
  
      //$code = html_entity_decode($code); // @todo uncomment this when tested
      eval(utf8_decode($code)); 
    }
  
    function render($frame) {
      $this->evaluate($frame->get_node()->nodeValue);
    }
  }