What about the stack?
PHP was originally compiled to Linux, Apache and MySQL, so it was mainly used in the LAMP Stack. Due to
technological advancements, it is successfully functioning as an independent system now. It also enables
developers to write RESTful servers, by extracting data from NoSQL database and transferring it to the
front. Besides, it may be an effective solution for building apps based on PostgreSQL.
Apache and Nginx web – servers are successfully used with PHP. The embedment with HTML
permits the PHP interpreter work with delimiters for processing the code.
Starting from PHP 5, it offers type declaration, for instance 5.0 version has classes and interfaces,
5.1 comes with arrays, while 5.4 offers "callables''. PHP 7 is the latest version and provides us with
scalars and function return types.
Starting from 2000, that is to say from the release of PHP 3, PHP is considered to be an object-oriented
programming language, that is why PHP 5 is filled with newly presented and enhanced features, including
member variables which are secured, classes (abstract and final) etc.