PHP is one of the most popular scripting languages on the web today. According to W3Techs, PHP is used by over 78% of all the websites who use a server-side programming language. This means for almost every 8 out of 10 websites you visit, they are most likely utilizing PHP in some form or another which also means that PHP is not dead. And of course, it plays a very vital role as it pertains to the WordPress ecosystem, as the entire CMS is built on PHP.