PHP is the first server side programming language I learned, mostly because of WordPress.
WordPress has been around for a long time, and is probably the only reason I still use PHP. I have developed a few wordpress plugins for various things. In fact, the youtube embeds your seeing on this site, are being lazy loaded by a plugin I made.
If your just learning web development for the first time, WordPress is a great option to start with. I also have a few wordpress plugins and themes that I recommend checking out.
PHP is a general-purpose scripting language geared towards web development. It was originally created by Danish-Canadian programmer Rasmus Lerdorf in 1994. The PHP reference implementation is now produced by The PHP Group. PHP originally stood for Personal Home Page, but it now stands for the recursive initialism PHP: Hypertext Preprocessor.