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Variables

Centra includes a few quality of life variables which makes it easier to do certain things.

$rel(<path>) — Relative Files

$rel() lets you reference files relative to the current content file without hard-coding absolute URLs. Centra resolves this variable server-side before sending content to the client.

Example

Without $rel (hard-coded URL):

![Banana Bread](https://cms.centra.test/api/images/banana-bread.jpg)

With $rel:

![Banana Bread]($rel(images/banana-bread.jpg))

Centra will replace this with the correct absolute URL automatically.

Requirement

For $rel() to work, CENTRA_PUBLIC_URL must be set:

CENTRA_PUBLIC_URL=https://cms.centra.example

This value is used as the base URL when resolving relative paths.

Notes

  • Paths are resolved relative to CONTENT_ROOT directory
  • Works only in YAML and Markdown files