Requirements

These are the constraints the Composer resolver actually enforces, plus the extensions the DNSSEC module needs at runtime. Nothing here is invented.

Enforced by Composer

From composer.json:

There are no runtime package dependencies — this is a zero-dependency library.

Needed by the DNSSEC module

The DNSSEC validator verifies signatures with two extensions. They are not hard Composer constraints, because the resolver, domain verification, propagation, and the non-DNSSEC diagnostics all work without them — only DNSSEC validation calls into them:

Both are part of a standard PHP distribution. If you validate DNSSEC on a build that lacks them, verification of the affected algorithm family cannot succeed.

Optional: internationalized names

Purely ASCII names need nothing extra. ext-intl is required only when you look up a Unicode name (e.g. blåbærgrød.dk); without it, a non-ASCII name is refused rather than silently queried as the wrong name. It is listed under Composer suggest, not require.

Development

Dev-only tooling (from require-dev), not needed to consume the package:

Framework

None. This library is framework-agnostic — it does not depend on Laravel or any other framework, and it is namespaced Cbox\Dns\.