Includes System - Site-Wide Content Blocks, Custom Widgets, and PHP Applications

CARL's includes system lets you define any block of HTML or PHP once and deploy it across your entire site from a single file. Your navigation, footer, sidebar, and signup form all work this way. So do custom lead generation forms, booking widgets, price calculators, and any other interactive application you need on your pages — all without plugins, subscriptions, or third-party services.

How to Secure Your CARL Include Files | Safe Input Handling for PHP Forms and Widgets | Carl Riedel

Essential security practices for PHP include files: validate user input, sanitize output, implement CSRF protection, secure file uploads, and prevent XSS attacks in your CARL CMS applications.

How to Build a Custom Include File in CARL | Add Any Block of HTML or PHP to Any Page | Carl Riedel

Build custom include files in CARL with this step-by-step guide. Add HTML or PHP blocks to any page without programming experience. Simple process from creation to deployment.

How CARL's Site-Wide Include Files Work | Headers, Footers, and Sidebars From One Place | Carl Riedel

Control your entire website from one place with CARL's powerful include file system. Edit headers, footers, navigation, and sidebars once to update every page instantly.

What You Can Build With CARL Include Files | PHP Applications Without Plugins or Subscriptions | Carl Riedel

Build powerful PHP applications with CARL include files - lead generation forms, booking widgets, price calculators, and promotional banners without plugins or subscriptions.

How CARL's Includes System Works | Site-Wide Content Blocks Controlled From One File | Carl Riedel

CARL's includes system lets you manage site-wide content blocks from a single file. Update your navigation, footer, or any reusable element once and see changes across your entire site instantly.

How to Manage Include Files in CARL | Site-Wide Content Blocks From One Place | Carl Riedel

How to use CARL's include file system to update site-wide content blocks instantly. Edit header, navigation, footer, and custom widgets from one place and push changes across hundreds of pages in seconds.