title: How can I use my own external class in CakePHP 3.0?
body: <p>I am creating an application in CakePHP 3.0, in this application I want to draw SVG graphs of data using a php class that I have written. What would be the proper way to go about using this class in my CakePHP 3 project?</p>
  
  <p>More specifically:</p>
  
  <ul>
  <li><p>What are the naming conventions? Do I need to use a specific namespace?</p></li>
  <li><p>Where do I put the file that contains the PHP class?</p></li>
  <li><p>How can I include it and use it in a controller or a view?</p></li>
  </ul>