Is PHP beneficial?
The open source nature of PHP allows for rich features and diverse functionality, making it useful on any website. PHP thrives as a web development option because it is secure, reliable and notably fast.
If you want to write scientific algorithms PHP is not a good choice, we use PHP to present web pages. Given that use, PHP does a really great job at being very maintainable and given you have the understanding of how the web works. Facebook takes up huge amount of load and it was written using PHP. Right now, they run it on HHVM which is fast and ‘open source’. So in case you feel PHP is slow, you can just start using HHVM which runs the PHP code much faster.
If you are a newbie and do not know much about programming and want to learn any application programming language, we recomend you to learn something else because PHP does web and it is great at that. If you want to become a great web-designer then learn PHP.