PHP, Cordova, Ionic
PHP: PHP stands for Hypertext Preprocessor and is a server-side programming language. There are many reasons to use PHP for server side programming, firstly it is a free language with no licensing fees so the cost of using it is minimal. PHP can also run on Windows, Linux and Unix servers.
Ionic: Ionic is a complete open-source SDK for hybrid mobile app development created by Max Lynch, Ben Sperry and Adam Bradley of Drifty Co. in 2013. The original version was released in 2013 and built on top of AngularJS and Apache Cordova. The more recent releases, known as Ionic 3 or simply "Ionic", are built on Angular. Ionic provides tools and services for developing hybrid mobile apps using Web technologies like CSS, HTML5, and Sass. Apps can be built with these Web technologies and then distributed through native app stores to be installed on devices by leveraging Cordova.