title: How to automatically enable php extensions in Homestead on vagrant up
body: <p>Im using Laravel 5.3 in Homestead with Vagrant  1.8.7 running on VirtualBox. </p>
  
  <p>I have need to enable some php extensions.</p>
  
  <p>I know that I could ssh into the box and edit the php.ini to enable the extension but this seems like a very anti-vagrant way to do this.</p>
  
  <p>I want to tell Vagrant to provision the box with specific php extensions enabled so that I can simply call <code>vagrant up --provision</code> and the box will be ready to go (kinda the point of vagrant right?)</p>
  
  <p>So, <strong>How can we automatically enable php extensions in Homestead on vagrant up?</strong></p>