title: how to complete install php trader extension
body: <p>Hi i am using Virtual box for using ubuntu 16.04 for this project</p>
  
  <blockquote>
    <p><a href="https://medium.com/@joeldg/an-advanced-tutorial-a-new-crypto-currency-trading-bot-boilerplate-framework-e777733607ae" rel="nofollow noreferrer">https://medium.com/@joeldg/an-advanced-tutorial-a-new-crypto-currency-trading-bot-boilerplate-framework-e777733607ae</a></p>
  </blockquote>
  
  <p>i have complete install successfully to composer update
  when i type composer update and hit enter i got error
  <a href="https://i.stack.imgur.com/Zwlpp.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Zwlpp.png" alt="enter image description here"></a></p>
  
  <p>than i have added <code>extension=trader.so</code> to php.ini and checking on phpinfo() its show me
  <a href="https://i.stack.imgur.com/2LUQY.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/2LUQY.png" alt="enter image description here"></a></p>
  
  <p>it showing me installed but still facing same error
  help me sorry for my bad english</p>