gistfile1.txt

<?php
class DownloaderComponent extends Object {
  function download_file($file) {
    $basename = basename($file);
    $file_extension = strtolower(substr(strrchr($basename,"."),1));
    
    switch($file_extension)
    {
      case "PLS": $ctype="audio/x-scpls"; break;
      case "pls": $ctype="audio/x-scpls"; break;
      case "pdf": $ctype="application/pdf"; break;
      case "exe": $ctype="application/octet-stream"; break;
      case "zip": $ctype="application/zip"; break;
      case "doc": $ctype="application/msword"; break;
      case "xls": $ctype="application/vnd.ms-excel"; break;
      case "ppt": $ctype="application/vnd.ms-powerpoint"; break;
      case "gif": $ctype="image/gif"; break;
      case "png": $ctype="image/png"; break;
      case "jpeg":
      case "jpg": $ctype="image/jpg"; break;
      default: $ctype="application/force-download";
    }
    
    header("Pragma: public");
    header("Expires: 0");
    header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
    header("Cache-Control: private",false); // required for certain browsers
    header("Content-Type: $ctype");
    header("Content-Disposition: attachment; filename=\"$basename\";" );
    header("Content-Transfer-Encoding: binary");
    readfile($file);
    exit();
    
    return true;
  }
}