$prefix = "file/";
// if previous file, delete it
if ($new_file == false) {
$filename = $file->getFilenameOnFilestore();
if (file_exists($filename)) {
unlink($filename);
}
// use same filename on the disk - ensures thumbnails are overwritten
$filestorename = $file->getFilename();
$filestorename = elgg_substr($filestorename, elgg_strlen($prefix));
} else {
$filestorename = elgg_strtolower(time() . $_FILES['upload']['name']);
}
$file->setFilename($prefix . $filestorename);
$file->originalfilename = $_FILES['upload']['name'];
$mime_type = $file->detectMimeType($_FILES['upload']['tmp_name'], $_FILES['upload']['type']);
// hack for Microsoft zipped formats
$info = pathinfo($_FILES['upload']['name']);
$office_formats = array('docx', 'xlsx', 'pptx');
if ($mime_type == "application/zip" && in_array($info['extension'], $office_formats)) {
switch ($info['extension']) {
case 'docx':
$mime_type = "application/vnd.openxmlformats-officedocument.wordprocessingml.document";
break;
case 'xlsx':
$mime_type = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
break;
case 'pptx':
$mime_type = "application/vnd.openxmlformats-officedocument.presentationml.presentation";
break;
}