My favourite PHP product at the moment is BookStack (https://www.bookstackapp.com/), a really good wiki. I run an instance for my family and it's great.
But there are loads of things. And I notice that many of the sites I like using...are built on well maintained PHP stacks.
I think the danger with PHP is more its ability to easily cause *very bad things*.
This would partially be poor training (my University literally taught PHP with SQL-injectable examples), and I think the language itself making it very easy, such that less-experienced developers using it - most of them, early on - don't realise what's wrong until it's gone wrong.
With PHP being such an early tool online, and the above properties existing, it earned a reputation for being insecure and bad.
During that same period, there were a lot of mediocre tutorials and documentation online, including on the PHP website itself which allowed people in comments to post code examples, but as far as I know there wasn't a lot of moderation on those.
And finally, a lot of people ended up writing their own frameworks and the like, because they could. But also because there weren't any or not many good and widely adopted frameworks out there, that came later with first Zend Framework and then Laravel, the latter being the de-facto standard nowadays.