Maybe fix issue 4?

[fiwswe]

Disclaimer: I do not use this plugin! It has only come to my attention because of the attempts by @rardcode to file an understandable issue in the correct place.

That said, the issue described in #4 (and previously in #3, linuxserver/docker-dokuwiki#58 and dokuwiki/dokuwiki#3840) seems to be caused by an excessive number of PHP warnings which in turn are triggered in

DokuWiki-WikiFormatStyling-Plugin/syntax/nwtag.php

Line 48 in 7189d24

if ( $data[1] == DOKU_LEXER_UNMATCHED ) {

because apparently $data is null in some cases.

I do not have enough experience with the DokuWiki plugin API to really tell but I think this might be caused by the handle() method not always having a defined return value. This is just a guess though. This PR attempts to fix the results of this by checking $data before use in the render() method.

The same thing seems to be happening in

DokuWiki-WikiFormatStyling-Plugin/syntax/pcnt.php

Line 48 in 7189d24

if ( $data[1] == DOKU_LEXER_UNMATCHED ) {

so I applied the same fix there.

Please note that this is completely untested. So please check whether this works before merging or implement a better fix if possible.

HTH
fiwswe