Concrete CMS
Concrete CMS (formerly concrete5) is a free PHP-based content management system that provides an intuitive in-page editor and flexible block system for building websites.
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A user-friendly open source CMS with drag-and-drop editing and block-based layout.
Core Features
- WYSIWYG in-page editor - drag and drop content directly
- Block-based layout - mix text, images, videos, and more
- Built-in SEO tools - sitemaps, meta tags, etc.
- Multilingual support - manage multiple languages easily
- Granular permissions - control user roles and editing rights
What It Can't Do
- •Requires PHP 7.4+ and MySQL/PostgreSQL; 2. Composer install requires PHP CLI; 3. Add-ons from concrete5 may not work on 9.x - verify compatibility before upgrading.
Use Cases
- Company websites - non-tech staff can update content
- Blogs and portfolios - simple setup, many themes
- Community portals - built-in forums and user management
Detailed Introduction
Concrete CMS is a free, open source content management system that allows you to build and manage websites with ease. It offers a user-friendly editing interface, flexible block-based content layout, and extensive customization through themes and add-ons. Originally named concrete5, the platform has evolved to version 9+ with modern PHP practices, Composer dependency management, and a strong community. It supports multilingual sites, SEO tools, and granular user permissions, making it suitable for both small businesses and large enterprises.
Troubleshooting & FAQ (1)
TroubleshootingHow to fix 'Cannot access protected property' error in block templates after upgrading to Concrete CMS 9.5?
This is a known bug introduced in Concrete CMS 9.5 that breaks block templates using legacy variables like $this->block or $this->controller. The official fix will be released in version 9.5.1. If you need an immediate workaround, you can manually patch the core files: In Concrete\\Core\\Block\\View\\BlockView::renderViewContents(), change $this->outputContent = $this->getTemplateService()->renderTemplate($this->template, $scopeItems, $this); to $this->outputContent = $this->getTemplateService()->renderTemplate($this->template, $scopeItems, $this->controller); and in Concrete\\Core\\Template\\Service\\TemplateService::renderPhpTemplate(), change $include = $include->bindTo($bindTo); to $include = $include->bindTo($bindTo, get_class($bindTo));. Alternatively, update your templates to use injected variables like $controller or $view instead of $this.
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Getting Started
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Install the software
Double-click the downloaded installer and follow the prompts
Step 1: Download the latest release or clone via Composer
Step 2: Extract files into your web server directory and configure virtual host to point to public/
Step 3: Open site URL in browser, follow installation wizard (database, admin account)
- Step 1: Download the latest release or clone via Composer
- Step 2: Extract files into your web server directory and configure virtual host to point to public/
- Step 3: Open site URL in browser, follow installation wizard (database, admin account)
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Delete the site directory and drop its database. Always backup important data first.
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