title: Relative Web path vs Absolute path
body: <p><em>this is a 3 part question</em></p>
  
  <p>Is there any performance or security risk in relative path ?  </p>
  
  <p>How can i convert relative path to absolute path [in a large project written in PHP] ?  </p>
  
  <p>in PHP when using <code>include</code> should i give the absolute path or the relative path ?</p>