42% of all websites are on Wordpress, which is written in PHP.[a] The vast majority of those websites use vanilla WordPress out-of-the-box to serve a tiny audie

42% of all websites are on Wordpress, which is written in PHP.[a] The vast majority of those websites use vanilla WordPress out-of-the-box to serve a tiny audience. If you look at market share by traffic, a much smaller share than 79% of the world's largest web sites (Wikipedia, YouTube, Google, Amazon, Facebook, Twitter, Reddit, Instagram, eBay, PornHub, etc.) run on PHP. Those websites account for the vast majority of Web traffic. [a] Source: https://wordpress.com https://wordpress.com -- EDIT: I changed "0.0%" to "a much smaller share than 79%" because I was wrong about Wikipedia, Facebook, Pornhub and likely other high-traffic websites. See comments below.