Frameworks
Contents:
Full Drush support and Composer-based builds make handling dependencies and builds for PHP frameworks as simple as committing your composer.json to your project.
Drupal 
Drupal is an open-source content management framework written in PHP. Since Composer comes pre-installed on Platform.sh, Drupal can be installed and updated completely using Composer. The default build flavor for PHP application runs composer install during build, handling all of your dependencies automatically.
Community Support
Drupal FAQs, how-to guides and other tutorials right on Platform.sh Community.
Templates
eZ Platform
eZ Platform is a CMS based on the Symfony full-stack framework. eZ Platform comes pre-configured for use with Platform.sh for versions 1.13 and later, all it takes is mapping a few environment variables to an existing project. Consult the caching, configuration, and local development best practices for eZ Platform and Fastly integration for more information.
Example Projects
Note:
Template projects (repositories in the platformsh-templates GitHub organization) are actively maintained by the Platform.sh team. Any other example projects come with less support, and remain in public repositories as proof-of-concepts.
Symfony
Symfony is a web application framework written in PHP. Like Drupal, Symfony projects can utilize native Composer to build applications and manage dependencies.
Community Support
Symfony FAQs, how-to guides and other tutorials right on Platform.sh Community.
Templates
TYPO3
TYPO3 is an open-source CMS written in PHP. Utilized Platform.sh native Composer to handle builds and maintain dependencies.
Templates
Wordpress
Wordpress is a PHP content management system. Platform.sh recommends using the composer-based installation method for Wordpress.
Community Support
All your Wordpress FAQs, plus how-to guides and tutorials right on Platform.sh Community.