PHP is one of the most used programming languages in building a website. Some of the leading companies who use PHP are Facebook, Wikipedia, MailChimp, and Slack.
PHP is also used in many Content Management Systems and eCommerce sites like WordPress, Drupal, and Etsy.
PHP is very flexible and scalable and is always keeping up with the latest demands in programming.
A PHP framework is a platform for creating web sites and applications. It contains libraries with pre-packaged functions. Some of the most common PHP frameworks are Laravel, Symphony, and Cake.
PHP is mostly used with the very popular MySQL, but can also be connected with many other databases. There is no cost in using MySQL, whereas other database require a license to be purchased.
PHP code has been used for over 30 years and it has been used in numerous high level applications. PHP is consistently upgrading their code to create a very stable environment.