Symfony
Symfony is a PHP web application framework and a set of reusable PHP components/libraries.
About
Symfony is a PHP web application framework and a set of reusable PHP components/libraries.
Categories: Web frameworks
Quick facts
How we detect Symfony
Each signal alone is rarely conclusive — Sourcemap Explorer cross-references all of them and weights by confidence. You can reproduce any of these checks yourself in Chrome DevTools.
Cookies set by the platform. Visible in DevTools → Application → Cookies.
sf_redirect
Window-level global the technology installs on page. Reproducible by typing the path into the DevTools console.
window.Sfjs
Script URL pattern. Typically a CDN host or chunk path that ships with the technology.
/@?symfony/
A DOM selector that only this technology's pages render. Verified at runtime by the content script.
div.sf-toolbar-block, div.sf-toolbar
Implies
When Symfonyis detected, Sourcemap Explorer also marks the following technologies as present (Wappalyzer's implies graph).
FAQ
How do I check if a website is using Symfony?
Open the page in Chrome, click the Sourcemap Explorer toolbar icon, and read the Stack tab. The popup matches Symfony's fingerprint signals (response headers, asset URL prefixes, runtime globals, sourcemap paths) and flags it whenever any combination is found. The same checks can be reproduced manually in DevTools — see the "How we detect" section above.
What Symfony version can Sourcemap Explorer detect?
Symfony ships as a hosted web frameworks rather than a bundled npm package, so version-specific detection isn't always possible. Where the platform leaks a version in response headers (`X-Powered-By`, `Server`, generator meta tags) we surface it; otherwise we report presence only.
Is Symfony open source?
Yes, Symfony is open source. The license details are listed on the official site (https://symfony.com), and the codebase typically lives on a public source-control host.
Where can I read more about Symfony?
Official site: https://symfony.com. For Sourcemap Explorer's detection guide, see the deep-dive link below or the related guides in the cross-link section.
Detected by Sourcemap Explorer
Open the popup on any page running Symfonyand you'll see the exact version pulled from the bundled package.json when sourcemaps are exposed.