title: php header() function problem about download file
body: <p>I have a file download function in my website. it works fine before. but after we moved the site to another server with runs PHP 5 (it runs on PHP 4 before). when click to download, it automatically adds a extra blank line at the beginning and the end of the file which we don't want to. Here is the code for downloading function:</p>
  
  <pre><code>header("Content-Type: application/gas");
  header("Cache-control: private");    
  header("Content-Disposition: attachment; filename=aaa.gas");
  </code></pre>
  
  <p>Could anyone please help me out? Thanks!</p>