For many years, I have been using PHP for building many of my projects and web applications. PHP is widely popular language. In PHP Zend is putting a lot of money. It is a very nice learning curve, even though to produce good code in PHP. It takes a long time effort as in other languages. PHP runs well on commodity hardware. PHP is a functional language. Most of the websites are powered by PHP and CMS`s such as WordPress, Drupal and Joomla are built with PHP.
If you join PHP in future then it gives you a better job opportunities, career growth, salary or also good for your future scope.