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Force file download

Here is the function to force open/save dialog and not just automatically open files in browser. You can modify it by adding more file extensions.

<?php
//$file = "/folder/filename.ext";
function force_download($file)
{
    $ext = explode(".", $file);
    switch($ext[sizeof($ext)-1])
   {
      case 'jar': $mime = "application/java-archive"; break;
      case 'zip': $mime = "application/zip"; break;
      case 'jpeg': $mime = "image/jpeg"; break;
      case 'jpg': $mime = "image/jpg"; break;
      case 'jad': $mime = "text/vnd.sun.j2me.app-descriptor"; break;
      case "gif": $mime = "image/gif"; break;
      case "png": $mime = "image/png"; break;
      case "pdf": $mime = "application/pdf"; break;
      case "txt": $mime = "text/plain"; break;
      case "doc": $mime = "application/msword"; break;
      case "ppt": $mime = "application/vnd.ms-powerpoint"; break;
      case "wbmp": $mime = "image/vnd.wap.wbmp"; break;
      case "wmlc": $mime = "application/vnd.wap.wmlc"; break;
      case "mp4s": $mime = "application/mp4"; break;
      case "ogg": $mime = "application/ogg"; break;
      case "pls": $mime = "application/pls+xml"; break;
      case "asf": $mime = "application/vnd.ms-asf"; break;
      case "swf": $mime = "application/x-shockwave-flash"; break;
      case "mp4": $mime = "video/mp4"; break;
      case "m4a": $mime = "audio/mp4"; break;
      case "m4p": $mime = "audio/mp4"; break;
      case "mp4a": $mime = "audio/mp4"; break;
      case "mp3": $mime = "audio/mpeg"; break;
      case "m3a": $mime = "audio/mpeg"; break;
      case "m2a": $mime = "audio/mpeg"; break;
      case "mp2a": $mime = "audio/mpeg"; break;
      case "mp2": $mime = "audio/mpeg"; break;
      case "mpga": $mime = "audio/mpeg"; break;
      case "wav": $mime = "audio/wav"; break;
      case "m3u": $mime = "audio/x-mpegurl"; break;
      case "bmp": $mime = "image/bmp"; break;
      case "ico": $mime = "image/x-icon"; break;
      case "3gp": $mime = "video/3gpp"; break;
      case "3g2": $mime = "video/3gpp2"; break;
      case "mp4v": $mime = "video/mp4"; break;
      case "mpg4": $mime = "video/mp4"; break;
      case "m2v": $mime = "video/mpeg"; break;
      case "m1v": $mime = "video/mpeg"; break;
      case "mpe": $mime = "video/mpeg"; break;
      case "mpeg": $mime = "video/mpeg"; break;
      case "mpg": $mime = "video/mpeg"; break;
      case "mov": $mime = "video/quicktime"; break;
      case "qt": $mime = "video/quicktime"; break;
      case "avi": $mime = "video/x-msvideo"; break;
      case "midi": $mime = "audio/midi"; break;
      case "mid": $mime = "audio/mid"; break;
      case "amr": $mime = "audio/amr"; break;
      default: $mime = "application/force-download";
   }
    header('Content-Description: File Transfer');
    header('Content-Type: '.$mime);
    header('Content-Disposition: attachment; filename='.basename($file));
    header('Content-Transfer-Encoding: binary');
    header('Expires: 0');
    header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
    header('Pragma: public');
    header('Content-Length: ' . filesize($file));
    ob_clean();
    flush();
    readfile($file);
}
?>

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