You can add runnable PHP examples to your own website
WordPress Playground provides an embeddable PHP snippet, which is a small component a website owner can add to a page. It displays the example, a Run button, and the result together. It can be used in tutorials, documentation, blog posts, and demos, so the feature is not limited to WordPress.org.
WordPress itself has started using these snippets in the official Code Reference. WordPress 7.1 supplied the first two runnable examples, and the WordPress announcement says more are coming with WordPress 7.2.
The PHP example on your page runs in its own temporary Playground environment. It does not run inside the WordPress installation hosting your website, and it does not use that site's files, plugins, or database.
What happens when you press Run?
When somebody presses Run, WordPress Playground starts a temporary test environment inside their browser. If the example uses WordPress functions, Playground loads a temporary WordPress installation for that snippet. This is separate from the website displaying the example.
Playground does this with WebAssembly, a format that lets software run safely inside modern browsers. You do not need to understand WebAssembly to use it. In practical terms, your browser gets a small, isolated test area, runs the sample there, and shows you what the PHP returned.
The first run can take a moment because the browser has to load that environment. After it starts, you get a real result rather than a picture of what the result should look like.
Why runnable WordPress PHP examples matter
This sounds like a feature only developers will notice, but better examples can help anybody who owns or looks after a WordPress site. When a piece of documentation is easier to test, it is easier to learn from and easier to use when diagnosing a problem.
| Who it helps | What gets easier |
|---|---|
| People learning PHP | Trying an example without installing a full development setup first |
| WordPress developers | Checking a small API example and seeing its output straight away |
| Documentation writers | Publishing examples that readers can verify instead of simply trusting |
| Support teams | Sharing a small, repeatable example when explaining a WordPress behaviour |
That last point is especially useful. A clear example reduces the usual back and forth about what code was run, which version was involved, and what result appeared. It does not solve a whole website problem, but it can make the smallest part of that problem much easier to discuss.
How to try WordPress PHP examples in your browser
You have three straightforward ways to use the feature.
- Start with a runnable Code Reference example. Visit the
WP_HTML_Processor::class_list()page and press Run on the example. - Open the standalone editor for your own small test. The WordPress PHP Playground lets you enter PHP, choose WordPress and PHP versions, run the code, and share the example with a link.
- Add a runnable example to your own website. The official PHP snippets guide shows how to embed the component in a web page. Visitors can then edit and run the example directly on that page.
Keep experiments small and never paste passwords, API keys, customer details, or private production code into a shared example. A browser playground removes installation work. It does not remove the need to handle sensitive information carefully.
Running PHP in your browser is not the same as testing your site
A runnable example tells you how a focused piece of code behaves in the Playground environment. Your website has far more moving parts: its theme, plugins, database, PHP extensions, server settings, cache, and real content can all affect the result.
That means Playground is a useful first step for learning or narrowing down an idea, not proof that a change is safe for a live website. If you are updating a plugin, changing a theme function, or fixing a real error, use a WordPress staging site that closely matches production. Take a backup before the change and check the result in the browser as a visitor and an administrator.
There is another useful distinction: this feature does not change how your live WordPress site runs PHP. The runnable example uses a separate Playground test environment that can be embedded in a web page.
A small WordPress 7.1 feature with a useful future
Only two Code Reference examples are runnable today, so this is the start of the idea. The important bit is the path it opens. More WordPress documentation can become something you can try, not just something you have to interpret before building a test setup of your own.
For developers, that can mean faster learning and clearer bug reports. For site owners, it can mean the person helping with a problem has a quicker way to explain and check one small part of it. The careful work still happens on staging before anybody touches the live site.
Quick answers about running PHP in your browser
Can I add runnable PHP examples to my own website?
Yes. WordPress Playground provides an embeddable PHP snippet component for tutorials, documentation, blog posts, and demos. The example runs in a separate Playground environment and does not use your live WordPress site's files or database.
Does the PHP code run on my live WordPress website?
No. The example runs in an isolated Playground environment in your browser, not on your live website or hosting account. It cannot test the exact combination of plugins, theme, settings, and server software used by your real site.
Do I need WordPress 7.1 installed to use runnable examples?
No. Playground creates a separate temporary environment for the example. WordPress 7.1 is relevant because it supplied the first two runnable examples used in the official Code Reference, not because your own site needs that version.
Will every WordPress Code Reference example have a Run button?
Not yet. WordPress 7.1 shipped the first two runnable examples, and the project says more are planned for WordPress 7.2. Most Code Reference examples remain ordinary code samples for now.
Is WordPress Playground a replacement for a staging site?
No. Playground is excellent for learning and small, isolated tests. A staging copy is still the right place to test an update or fix against your real theme, plugins, content, database, and hosting setup before changing the live site.