PHP is the programming language that powers a huge share of the web, including WordPress — it is the language your server runs to build dynamic web pages. When someone visits a WordPress site, PHP runs on the server to assemble the page from the database and send it to the browser. For hosting, what matters most about PHP is its version: newer PHP versions run faster and are more secure, so keeping PHP current is a simple, valuable habit. You do not need to know how to program in PHP; you just need to understand its role and why the version matters.
This guide explains what PHP is, what it does for your site, why the version matters, and how it relates to your hosting — all without needing any coding knowledge.
Did you know?
PHP does its work entirely on the server, before the page reaches the visitor: by the time you see a WordPress page, PHP has already run, queried the database, and assembled the HTML — all invisibly.
What PHP is
PHP is a server-side programming language — a language that runs on the web server (rather than in the visitor’s browser) to generate web pages. It is one of the most widely used languages on the web, and crucially, it is the language WordPress and many other content management systems and applications are built in.
So PHP is the engine behind a great many websites. You do not see PHP directly — it runs on the server and produces the finished page that is sent to the browser — but it is doing the work of building dynamic sites behind the scenes. For most site owners, PHP matters not as something to learn, but as something their site runs on.
What PHP does for your site
On a dynamic site like WordPress, PHP is what builds each page when it is requested. When a visitor loads a page, PHP runs on the server, pulls the relevant content from the database, applies the theme and logic, and assembles the finished HTML page, which is then sent to the browser. All of this happens in the moment, for each request (unless the page is cached).
This is why PHP is central to how WordPress works: WordPress is essentially a large PHP application. Every post, page, and dynamic element is generated by PHP drawing on the database. So PHP is doing the real work of turning your stored content into the pages visitors see, which is why its performance and version affect your site.
Why the PHP version matters
For hosting, the most important thing about PHP is its version. PHP is regularly updated, and newer versions bring two big benefits: they run faster (each recent version has improved performance, so pages build quicker), and they receive security updates, while old versions eventually stop being supported and can harbour vulnerabilities.
So running a current PHP version makes your site both faster and more secure, at no cost. An outdated PHP version, by contrast, is slower and potentially insecure. This is why keeping PHP up to date is one of the simplest, most valuable maintenance habits — and why good hosting runs current PHP and lets you keep it current easily.
How PHP relates to your hosting
Your hosting provides the PHP that runs your site, and good hosts run a current version by default and let you choose or update the version in your control panel. When a plan mentions PHP or lets you select a PHP version, this is what it refers to — the language environment your site runs in.
Because PHP runs on the server, its performance is tied to your hosting’s speed and resources too. A fast server running current PHP builds pages quickly; caching then avoids rebuilding them at all for most visitors. So PHP, your hosting, and caching work together to determine how fast your dynamic site is, with the PHP version being the part most worth keeping current yourself.
Pro Tip
Check your WordPress dashboard’s Site Health tool — it flags an outdated PHP version. If it does, updating PHP (in your control panel, or by asking your host) is a quick, free speed and security win.
Do you need to know PHP?
As a typical site owner, no — you do not need to know how to program in PHP. WordPress and your hosting handle the PHP side; you just create content, and PHP does its work invisibly. Learning to code in PHP is only necessary if you want to do custom development, which most people never need to.
What you do benefit from is understanding PHP’s role and the importance of its version. Knowing that PHP builds your pages, and that keeping it current makes your site faster and safer, is enough to make a good maintenance decision. Beyond that, PHP happily runs in the background, and you can leave the coding to WordPress and the developers who build the plugins and themes you use.
Ready to put the theory into practice?
Hostinger makes the technical side simple — one-click WordPress, free SSL and domain, a clean control panel, and 24/7 support — so you can build without wrestling with the jargon. From a few dollars a month; use code PROTIPS for the reader discount.
FAQs
What is PHP in web hosting?
PHP is a server-side programming language that runs on your web server to build dynamic web pages. It is the language WordPress and many other applications are built in. When someone visits a WordPress site, PHP runs on the server to assemble the page and send it to the browser.
What does PHP do for my website?
On a dynamic site like WordPress, PHP builds each page when requested — it pulls content from the database, applies the theme and logic, and assembles the finished HTML sent to the browser. Every post and dynamic element is generated by PHP, so it does the real work of turning stored content into pages.
Why does the PHP version matter?
Because newer PHP versions run faster and receive security updates, while old versions are slower and can harbour vulnerabilities once unsupported. Running a current PHP version makes your site both faster and more secure at no cost, which is why keeping PHP up to date is a valuable habit.
Do I need to learn PHP to run a website?
No. As a typical site owner, WordPress and your hosting handle the PHP side, and it runs invisibly while you just create content. Learning to code PHP is only needed for custom development, which most people never require. You just need to understand PHP’s role and keep its version current.
How do I update my PHP version?
Usually in your hosting control panel, which lets you choose the PHP version, or by asking your host. Check your WordPress dashboard’s Site Health tool first — it flags an outdated version. Updating to a current PHP version is a quick, free speed and security improvement.
How does PHP relate to my hosting?
Your hosting provides the PHP that runs your site, and good hosts run a current version by default and let you update it in the control panel. Because PHP runs on the server, its performance ties into your hosting’s speed and resources, working with caching to determine how fast your dynamic site is.
The bottom line
PHP is the server-side programming language that powers much of the web, including WordPress — it runs on your server to build dynamic pages, pulling content from the database and assembling the HTML that visitors see. You never see PHP directly, but it does the real work behind every WordPress page, which is why it is central to how your site runs.
For hosting, the version is what matters most: newer PHP is faster and more secure, so keeping it current is a simple, free maintenance win. You do not need to learn to code in PHP — WordPress and your host handle it — you just need to understand its role and keep the version up to date, ideally letting a good host manage that for you. Grasp that, and PHP becomes one less piece of jargon to worry about.
When you are ready, you can start with Hostinger and use code PROTIPS for the reader discount. PHP is the language that builds your WordPress pages — you needn’t code it, just keep its version current for speed and security.