Dokuwiki: '0' headline isn't displayed.

[epeios-q37]

A headline containing only the '0' digit is not displayed. I put an example in the playground.

[Klap-in]

Thanks for the clear example.
https://www.dokuwiki.org/playground:bug1770

I guess somewhere is checked if we have an empty value.

[Klap-in]

https://github.com/splitbrain/dokuwiki/blob/master/inc/parser/xhtml.php#L1691

If $heading is '0', it is skipped, and $default is returned instead.

            if(useHeading($linktype) && $id) {
                $heading = p_get_first_heading($id);
                if($heading) {
                    return $this->_xmlEntities($heading);
                }
            }
            return $this->_xmlEntities($default);

[Klap-in]

Hmm this is for titles of the urls.

This is the check for headers, same logic:

https://github.com/splitbrain/dokuwiki/blob/master/inc/parser/xhtml.php#L194

    if(!$text) return; //skip empty headlines

[micgro42]

So we should use blank() in these cases?