Setting charset in Doctype::XHTML1_RDFA fails

[basz]

I'm getting an error when I set the charset on a rdfa document. Is that expected? Or an oversight?

        // set doctype
        $this->helperPluginManager->get('doctype')
            ->setDoctype(\Zend\View\Helper\Doctype::XHTML1_RDFA);

$this->helperPluginManager->get('headMeta')
            ->setCharset('utf-8');

Invalid value passed to set; please use setMeta()
./vendor/zendframework/zend-view/src/Helper/HeadMeta.php:442

Further; following the suggestion in the error gives me an error too.

$this->helperPluginManager->get('headMeta')
         ->setMeta('charset', 'utf-8');

Method "setMeta" does not exist
./vendor/zendframework/zend-view/src/Helper/Placeholder/Container/AbstractStandalone.php:83

[samsonasik]

the source of error seems came from

zend-view/src/Helper/HeadMeta.php

Lines 337 to 342 in 4d9954c

	if (! isset($item->content)
	&& (! $this->view->plugin('doctype')->isHtml5()
	|| (! $this->view->plugin('doctype')->isHtml5() && $item->type !== 'charset'))
	) {
	return false;
	}

[froschdesign]

@basz

Is that expected?

Right, because XHTML has no attribute charset for the meta element.
Use http-equiv:

$this->headMeta()->appendHttpEquiv('Content-Type', 'application/xhtml+xml; charset=utf-8');

[froschdesign]

We should add a check or throw an Exception for this case.

[samsonasik]

@basz @froschdesign I've created PR #137 for it.

[basz]

thanks all!

[froschdesign]

@basz
Thanks for reporting! 👍