title: Php - character returned by file_get_contents
body: <p>i'm using file_get_contents to retrieve the content of external webpages and then i log the received content into a txt file.</p>
  
  <p>The problem is i've founded some void in the middle of the page, and since that part of page is a human written text i exclude void is really present in the page.</p>
  
  <p>So i've an output like this:</p>
  
  <pre><code>Lorem ipsum void sit avoidet, consectetur adipisici elit, sed eiusmod tempor
  </code></pre>
  
  <p>So which characters may be returned as "void" with file_get_contents?</p>
  
  <p>Thanks a lot</p>