Short answer
PHP is an open-source programming language commonly used to run websites on a server. It processes requests, works with databases and produces responses for a browser. WordPress, WooCommerce and Magento all depend on PHP.
What PHP actually does
You click a product. The server looks up its price, checks availability and sends back a page. PHP can handle that server-side work; HTML, CSS and JavaScript handle much of what the browser displays and does.
PHP is not a website builder, a database or an operating system. It is one layer of the system. The PHP manual describes both web and command-line uses, including scheduled scripts.
A typical store might use Ubuntu as its operating system, PHP to execute application code, WordPress to manage content and WooCommerce to manage sales. Updating one layer does not update the others.
Why PHP keeps showing up
Our view: PHP is close to inevitable in client work. Not because every new project should use it, but because existing businesses already do. Their content, integrations, staff habits and sales history do not disappear when a newer framework arrives.
W3Techs reported PHP on 69.3% of websites whose server-side language it could identify, checked October 21, 2026. That denominator matters. It is not a count of every application or a measure of revenue, traffic or code quality.
WordPress is a large part of this installed base. PHP also serves custom applications and other platforms; it is not another name for WordPress.
Does vibe coding change the picture?
Possibly, particularly for new projects. Vibe coding lowers the barrier to building a custom application instead of starting with a CMS. It does not remove hosting, authentication, upgrades or support. It changes how some software gets made, not whether it needs maintenance.
Treat a future shift in market share as a hypothesis. For a working business site, the immediate question is whether PHP remains a sensible, supported dependency, not whether it wins the internet’s next argument.