CakePHP 3 is a web development framework running on PHP 7.1 (min. PHP 5.6.0). Read CakePHP at a Glance to get an introduction to the fundamentals of CakePHP 3. The CakePHP cookbook is an openly developed and community editable documentation project. Notice the pencil icon button fixated against the right wall; it will direct you to the GitHub online editor of the active page, allowing you to contribute any additions, deletions, or corrections to the documentation.