title: Determine if visitor comes from my home computers using PHP
body: <p>I want to design a webpage that can be accessed only by specific computers (the ones in my house), otherwise it just prints "Error". Using htaccess I can block I.P addresses that are not mine. However, the I.P address of my computers appear to change every now and then (I guess it's my ISP), so this is not so reliable.</p>
  
  <p>I am using PHP. Is there a way to only allow visitors using my home computers? I want to avoid a login/password scheme.</p>