public function add_attributes($attribs = array('audio' => array('preload' => 'none'), 'iframe' => array('sandbox' => 'allow-scripts allow-same-origin'), 'video' => array('preload' => 'none')))
{
if ($attribs) {
if (is_array($attribs)) {
$this->add_attributes = $attribs;
} else {
$this->add_attributes = explode(',', $attribs);
}
} else {
$this->add_attributes = false;
}
}