I haven't checked recently, but PHP jobs tend to pay less than other languages. I've also been at interviews where the interviewer mocked PHP and I would probably have been marked lower if I tried to write my answers in PHP.

Overall, PHP has matured a lot in recent years and gained in features that was missing from other popular languages (e.g. Composer/Packagist, Laravel, PHP 7 and PHP the Right Way probably contributing the most).