/** * Add tag to block * * @param string|array $tag * @return Mage_Core_Block_Abstract */ public function addCacheTag($tag) { if (method_exists('Mage_Core_Block_Abstract', 'addCacheTag')) { return parent::addCacheTag($tag); } if (!is_array($tag)) { $tag = array($tag); } $this->addData(array('cache_tags' => $tag)); return $this; }