HTMLPurifier - Run composer again?

I just started using HTMLPurifier within Yii and on the page it states you should:

[i]

Note that you should add ezyang/htmlpurifier to your composer.json require section and run composer install before using it.[/i]

But it seemed to work just fine without running composer install again - is there any particular reason it needs to be run?

If it works you don’t need to do anything. I’ll check if description is still valid.

Ok cool, thanks!