WordPress is written in PHP, a programming language frequently used on the web. PHP code generates the HTML pages sent to a browser by querying the database to gather content and combine it with templates. From this, a final output is generated and displayed to users.
This is why WordPress is so powerful. In addition to being a content management system, WordPress is a framework: it provides functions and APIs that developers can use to build a website. In essence, a WordPress theme is a bundle of code that takes advantage of this framework. Read morePosted in: WordPress