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See Release Notes

  • Bug fixes for general core bugs in 4.0.x will end 8 May 2023 (12 months).
  • Bug fixes for security issues in 4.0.x will end 13 November 2023 (18 months).
  • PHP version: minimum PHP 7.3.0 Note: the minimum PHP version has increased since Moodle 3.10. PHP 7.4.x is also supported.
   1  <?php
   2  
   3  /**

   4   * Pre-transform that changes proprietary background attribute to CSS.

   5   */
   6  class HTMLPurifier_AttrTransform_Background extends HTMLPurifier_AttrTransform
   7  {
   8      /**

   9       * @param array $attr

  10       * @param HTMLPurifier_Config $config

  11       * @param HTMLPurifier_Context $context

  12       * @return array

  13       */
  14      public function transform($attr, $config, $context)
  15      {
  16          if (!isset($attr['background'])) {
  17              return $attr;
  18          }
  19  
  20          $background = $this->confiscateAttr($attr, 'background');
  21          // some validation should happen here

  22  
  23          $this->prependCSS($attr, "background-image:url($background);");
  24          return $attr;
  25      }
  26  }
  27  
  28  // vim: et sw=4 sts=4