title: How to install Doctrine in CodeIgniter 3
body: <p>The <a href="http://doctrine-orm.readthedocs.org/en/latest/cookbook/integrating-with-codeigniter.html" rel="noreferrer">official guide</a> is not complete, and <a href="https://www.google.it/search?q=install%20doctrine%20in%20codeigniter" rel="noreferrer">others</a> are for CI2.</p>
  
  <p>So i give you a tutorial i myself checked is working.</p>
  
  <p>I know SO encourage users <a href="https://stackoverflow.com/help/self-answer">to answer their own questions</a>.</p>