regarding downloading the image file using php code
<blockquote>
  <p><strong>Possible Duplicate:</strong><br>
  <a href="http://stackoverflow.com/questions/8028957/headers-already-sent-by-php">Headers already sent by PHP</a>  </p>
</blockquote>



<blockquote>
  <p>Warning: Cannot modify header information - headers already sent by
  (output started at C:\xampp\htdocs\phppractice\file
  download\download.php:3) in C:\xampp\htdocs\phppractice\file
  download\download.php on line 4</p>
  
  <p>Warning: Cannot modify header information - headers already sent by
  (output started at C:\xampp\htdocs\phppractice\file
  download\download.php:3) in C:\xampp\htdocs\phppractice\file
  download\download.php on line 5</p>
</blockquote>

<p>I'm facing this error while dowloading a file using PHP.  I have 2 files, <code>index.php</code> and <code>download.php</code>.  Why am I getting this error?</p>
