CMSimple: Detailed technical description
📅 Release date
CMSimple was created in 2001 by Danish developer Peter Harteg . Version 1.0 was released the same year. Version 3.x was the standard for a long time, distributed under the AGPL3 license and then GPL3 from December 2009. After being abandoned by its original author, the project was taken over by German developer Gert Ebersbach , who released version 4.0 in December 2012 (based on CMSimple_XH 1.5.3), followed by the 5.x branches (including version 5.15 released in 2023), which are actively maintained to this day.
📝 License
CMSimple is open-source software distributed under the GNU General Public License v3 (GPL v3) since December 31, 2009. It is entirely free and open source: no link back to the author is required since that date. The CMSimple_XH variant is also distributed under GPL v3 , with a (non-mandatory) request for a courtesy link to the official website in the templates.
💻 Programming language
CMSimple is entirely developed in PHP (compatible with PHP 5.3 for the 4.x branch, and PHP 7.x and PHP 8.x for the 5.x branch). The front-end uses HTML5 , CSS3 , and JavaScript . The CMSimple_XH branch uses customizable HTML/CSS templates and offers a PHP API for plugin development. The integrated WYSIWYG editor is based on TinyMCE in recent versions.
🏛️ Architecture
- • Flat-file architecture (without database): all site content is stored in a single HTML file , structured by title tags
<h1>,<h2>and<h3>to automatically generate the navigation menu. - • Separation of content and presentation : the content is in an HTML file, the design is in a template file (HTML template + CSS stylesheets) and the configuration is in separate PHP files.
- • Plugin system : functionality is extended via independent PHP plugins, each placed in its own subdirectory under
/plugins/. - • Single-page architecture : all pages of the site coexist in a single file, with a hierarchy of 3 levels by default (modifiable up to 6 levels via configuration).
- • Compatible with all server configurations supporting PHP : Linux/Apache, Windows/Apache, Windows/IIS, including free shared hosting.
📂 Database
CMSimple is one of the few CMSs that operates entirely without an SQL database . Its content is stored in flat files :
- • Content file (
content/content.htm): stores all the site's pages in HTML, structured by H1/H2/H3 tags. - • Configuration file (
config/config.php): general site settings. - • Language files (
languages/): translations of the interface into each language. - • Template files (
templates/): HTML/CSS templates defining the visual appearance. - • Userfiles directory (
userfiles/): media storage (images, PDF documents, downloadable files).
The complete absence of an SQL database eliminates server queries, significantly speeds up page display , and allows installation on any PHP host, even free ones.
⚙️ Main features
✅ Database-free CMS : No MySQL installation required — content stored in a single HTML file, backed up with a single click.
✅ Ultra-fast installation : A complete website up and running in less than 20 minutes — simply upload the files to the server and configure a few settings.
✅ Integrated WYSIWYG editor : Online visual editing interface (TinyMCE) allowing you to create and modify pages directly in the browser, without knowing HTML.
✅ Automatically generated navigation : The hierarchical menu, site map and breadcrumb are automatically generated from the H1, H2 and H3 tags of the content.
✅ CSS template system : Hundreds of free templates available to customize the site's appearance without touching the PHP code.
✅ Multilingual and multi-site : Native support for multilingual (with flag icons) and multi-site since version 4, as well as a co-authoring feature.
🔥 Advanced Features
🚀 Rich plugin system : Hundreds of free PHP plugins available to add a blog, photo gallery, contact form, guestbook, newsletter, forum, calendar, shop, etc.
📊 Content versioning : Automatic saving of the last 10 versions of the content file, allowing you to restore a previous version in case of error.
🔌 Integrated template editor : Modify the HTML template and CSS stylesheets directly from the administration interface, without FTP access.
🔗 Integrated search module : Simple text search engine included natively, allowing visitors to search within the site's content.
📦 CMSimpleRealBlog : A specialized variant of the CMS that transforms CMSimple into a complete blog engine, with management of chronological articles and categories.
💡 Import from Microsoft Word : Ability to copy and paste text from Microsoft Word while preserving character formatting, simplifying the work of non-technical writers.
🔐 Security
🔹 Password authentication : Access to the administration interface is protected by a password stored in hashed form in the configuration file.
🔹 No database required : The flat-file architecture eliminates by design the risks of SQL injection, one of the most common attack vectors against CMS.
🔹 Protection of the administration directory : The admin directory can be protected by an additional access restriction via .htaccesson the Apache servers.
🔹 Regular security updates : The active 5.x branch, maintained by the CMSimple_XH community, regularly publishes security patches on GitHub.
🔹 File permissions : The PHP file system allows you to configure read/write access rights on sensitive directories ( content/, config/, userfiles/).
🔹 Reduced attack surface : The compactness of the code (a single PHP core file) and the absence of a database significantly minimize the attack surface compared to database-based CMS.
✅ The pros and cons
✅ Advantages
✔️ No database required : Installation possible on any host supporting PHP, including free hosting — no MySQL needed.
✔️ Extremely lightweight and fast : No SQL queries and compact core code guaranteeing very fast display times, even on low-powered servers.
✔️ Immediate setup : Site operational in less than 20 minutes, ideal for beginners and small structures without advanced technical skills.
✔️ Trivial backup : Backing up the entire site is as simple as copying a few files — no need to export a database.
✔️ Completely free and open source : GPL v3 license, source code available on GitHub, no license fees.
✔️ Hundreds of free plugins : Gallery, blog, forms, shop, newsletter — an active community ecosystem, particularly French and German speaking.
❌ Disadvantages
❌ Unsuitable for large sites : Single-page architecture (all content in a single file) becomes problematic for sites with hundreds of heavy pages.
❌ Limited navigation hierarchy : Only 3 levels of depth by default (H1 / H2 / H3), expandable to 6 levels — insufficient for complex site structures.
❌ Single level of administration : By default, only one administrator account — multi-user management with differentiated rights requires specific plugins.
❌ Less suitable for dynamic web applications : CMSimple is designed for static showcase sites — advanced features (complex e-commerce, community) remain limited even with plugins.
❌ Smaller community : Compared to WordPress, Joomla or Drupal, the user base and availability of technical support outside of the French and German-speaking communities are limited.
🌐 Official website
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