Do you mean "LoL" as in he's wrong?
Because I agree with that article, wholeheartedly.
As powerful as PHP is and as clean as it can be - especially with a solid framework like Laravel or Symfony - you'll still have folks churning out bad code which some poor soul will have to maintain because management doesn't see any immediate financial incentives in taking some time out to redo it hence the bad taste that is left in the mouth of the maintainer.
Ultimately, the OP of the article hit the nail on the head with the statement: "Using PHP it’s very easy to produce bad code. Other languages have many more restrictions."
But, the future is looking promising and TBF, with the advent of PHP 7, you should be able to write clean, robust, and maintainable code, now. Unfortunately, PHP 7.1 is now in EoL, yet, I've seen firsthand companies still using 5.4 and 5.6. The worst part is that they see no issue with that.
And, with PHP 8, things are looking even more promising. I'd say PHP isn't going anywhere anytime soon.