[[ https://www.mediawiki.org/wiki/API:Calling_internally?oldid=1501847 | API:Calling_internally ]] had bad-looking PHP examples. They were using
$params = new DerivativeRequest(
The generated HTML has CSS spans in it like <div class="php-brief source-php-brief"> ... <span class="kw3">array</span>... </div>, but there are no styles for php-brief so the code isn't colored. And there's some weird framing.
The workaround is easy, just switch to `lang=php`.
To fix maybe lang=php-brief should request its own `ext.geshi.language.php-brief` ResourceLoader styles module or reuse the php CSS, but it's probably easier to just deprecate it and/or treat php-brief as a synonym for `lang=php`.
Meanwhile I've deprecated php-brief in https://www.mediawiki.org/wiki/Extension:SyntaxHighlight_GeSHi