title: Sandboxing PHP Phar files
body: <p>i am making an application that has the ability to run plugins, now i wish to sandbox these plugins to only be able to run in their own environment (not able to access files from the installation) and not be able to access configuration settings (such as the database password which are defined by 'define' variables)</p>
  
  <p>What should i use to sandbox my phar plugins?</p>