@federico-lox It's only _unusual_ when compared to other languages. That's what I think the PHP manual is saying. Because in PHP, trailing commas are much more common for multi-line arrays. And saying we shouldn't get in the habit of doing something because of working with other languages I don't think is a very good argument. To use a ridiculous example, like you did :smiley:, should we not get in the habit of wrapping if statements in braces in PHP because we might also be working with Python? Every language is different, and when the MediaWiki coding conventions don't specify (and they don't in this case), I think we should use the most common convention for the language.