PHP is still the leading server-side language and it's not even close. 3/4 of the websites you visit everyday are powered by PHP in some form. I would argue that's the perfect server-side language to start solo on anything web-related for the foreseeable future. And if you'll ever need to scale up, there's no shortage of skilled PHP developers for hire. The language just keeps getting better, frameworks like Laravel and Symfony are high quality and battle-tested, most of the issues you might encounter are already documented all over the internet. Continuous learning is a reality for this profession but the "cult of the new" attitude in tech often leads aspiring developers into an endless quest for the perfect tool at the expense of gaining practical experience. Point being, PHP is faaar from dead. If you live in Europe, a solid knowledge of PHP and either Laravel or Symfony will open many doors.