Vantorix – Subfolder Link Fixer

Links such as /, /about-us/ or /contact/ are handy because they work on any domain. But when WordPress lives in a subfolder — for example https://example.com/demo/ — those links jump to the domain root and visitors land on the wrong page or a 404.

Subfolder Link Fixer detects your site’s subfolder from the Home URL and quietly fixes those links in the page sent to the browser:

• href="/" becomes href="/demo/"
• href="/about-us/" becomes href="/demo/about-us/"
• Form actions like action="/contact/" are fixed too.

Nothing is written to your content. Your posts, menus and page-builder data stay exactly as they were, so you can move the site back to a root domain, export it, or switch the plugin off at any time.

Features

• Automatic subfolder detection from the Home URL — nothing to configure.
• Choose what to fix: links (href), form actions (action), images and scripts (src) and responsive images (srcset).
• Excluded paths: keep links that should really leave the site, such as /shop/ on the same domain, untouched.
• Manual subfolder for sites served from a folder by a reverse proxy.
• Live link tester on the settings screen shows exactly what visitors get.
• Automatic page-cache clearing when settings change, for LiteSpeed Cache, WP Rocket, W3 Total Cache, WP Super Cache and SiteGround Optimizer.
• Debug comment for administrators with the number of links fixed on a page.
• Site Health section under Tools → Site Health → Info.
• WP-CLI: wp subfolder-links status and wp subfolder-links test / /about-us/.

Good for

• Theme and template-kit demo sites hosted side by side, e.g. example.com/kit-one/, example.com/kit-two/.
• Staging copies that live in a subfolder of the live domain.
• Subdirectory Multisite networks — every subsite gets its own folder automatically.
• Imported content or page-builder layouts that contain hard-coded / links.

What it leaves alone

• Protocol-relative links (//cdn.example.com/...) and full URLs.
• Links that already include the subfolder, and paths you exclude.
• data-* attributes.
• Admin screens, AJAX, REST API, feeds and the Elementor editor preview.
• Sites installed at the domain root — the plugin simply stays idle.

For developers

• vantorix_slf_attributes — array of attributes to rewrite.
• vantorix_slf_excluded_paths — array of path prefixes to skip.
• vantorix_slf_should_run — return false to skip the current request.
• vantorix_slf_purge_caches — action fired after settings change; purge your own cache here.

Example: skip rewriting on one page.

add_filter( 'vantorix_slf_should_run', function ( $run ) {
    return is_page( 'landing' ) ? false : $run;
} );