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When Contao projects grow, mixing PHP and HTML in templates creates maintenance debt. This architecture note explains how Twig enforces boundaries, the smallest safe override, and how to verify cache and debug behavior.
Sulu zones let editors compose flexible page regions, but unbounded nesting and vague block definitions create Twig complexity and inconsistent layouts. Learn how to define zones deliberately, map custom blocks to templates, and verify the result.
Decide between Symfony's global form themes and manual Twig rendering to balance development speed with design precision. Learn how to override blocks for consistent UI.
Learn how to add metadata to Contao pages without touching the core database, see a step‑by‑step example, and understand the trade‑offs of using Custom Fields.
Learn how to create reusable, decoupled page layouts in Contao 5 using Twig templates, block overrides, and the Page ‘Template’ field. A step‑by‑step example shows how to assign a custom template, verify it renders correctly, and avoid common pitfalls.
Learn how to use Contao's native List module to implement database-level filtering and pagination, reducing page load times and improving content discovery.
Goal: Make every invalid form field expose an aria-describedby attribute that points to the ID of its error list so that assistive technologies announce validation messages when the field gains focus. Constraint: The default Symfony form themes (including the Bootstrap theme) do not automatically add aria-describedby linking the input to the form_errors bloc
Goal Ensure that dates rendered in a Contao CMS site appear in the correct regional time zone for each language, while keeping the core configuration stable. Constraints & Uncertainty Contao uses the PHP date.timezone setting for its default system offset. Dates are formatted in Twig via the date filter, which relies on PHP’s DateTime objects. There is n
contao
symfony
sulu