Isn't it just not that popular an option anymore to start new projects with? Most people are aware of the language having changed a lot since its heydays.
And honestly, from the article I'm not quite sure why I should consider using PHP. Sure, it has a lot of modern bells and whistles now that it didn't when I last used it 2005-ish, but what makes it stand out? I know a number of people that are super happy and productive with modern PHP, but those are all people that have been using it continuously since forever so it makes a lot of sense for them. But why switch to it from another stack?
E.g. the supposed best database integration of any language with "PHP Database Objects". At least the examples given are the absolute bare minimum I'd expect to get from such an integration. What makes it the best?