CakePHP provides user to do advance view designing and making custom architecture for designing, for quick web developments. The CTP file extension is associated with the CakePHP. Ctp file contains template CakePHP template. It is as same as a view file that can load on web browser as html and can functioning with controllers also Moreover .ctp files can be used as architecture to hold the model of view and its layouts

By default CakePHP view files are written in plain PHP and have a default extension of .ctp (CakePHP Template). These files contain all the presentational logic needed to get the data it received from the controller in a format that is ready for the audience youre serving to. If youd prefer using a templating language like Twig, or Smarty, a subclass of View will bridge your templating language and CakePHP.

                                                                          By- http://book.cakephp.org

You change the extension .ctp to .php for views to set the $ext property for specific controller

 $this->ext = '.php';

or

public $ext = '.php';

Normal you can store this file at /app/View/Products/view.ctp.