<?php /** * Pre-transform that changes proprietary background attribute to CSS. */ class HTMLPurifier_AttrTransform_Background extends HTMLPurifier_AttrTransform { public function transform($attr, $config, $context) { if (!isset($attr['background'])) return $attr; $background = $this->confiscateAttr($attr, 'background'); // some validation should happen here $this->prependCSS($attr, "background-image:url($background);"); return $attr; } } // vim: et sw=4 sts=4