title: can you explain to me this php warning about https
body: <p>I received the following warning, when I tried to access a file from gitub in PHP script:</p>
  
  <blockquote>
    <p>Warning: DOMDocument::load() [domdocument.load]:
            Unable to find the wrapper "https" - did you forget to enable it when you
            configured PHP? 
            in C:\xampp\htdocs\plaoul\text\gittest.php on line 13`</p>
  </blockquote>
  
  <p>Can you explain what "wrapper" is, what needs to be configured, and generally what's happening?</p>