PHP is a programming and scripting language to create dynamic interactive websites. WordPress is written using PHP as the scripting language. Just like WordPress, PHP is also an Open Source.

PHP is a server side programming language. When a user requests a web page that contains PHP code, the code is processed by the PHP module installed on that web server. The PHP pre-processor then generates HTML output to be displayed on the user’s browser screen.

WordPress core is build on PHP. This is  because it’s a solid programming language for web development. It’s very popular and prevalent and powers the majority of websites.

PHP Latest Version

Until the time this glossary term was written the latest version of PHP is 7.3.10. You can follow the entire list of PHP releases straight from this link.