public function allowedUpload($originalFilename)
{
// Check if file_uploads ini directive is true
if (ini_get('file_uploads') != 1) {
throw new IOException('File uploads are not allowed, check the file_uploads ini directive.');
}
// no UNIX-hidden files
if ($originalFilename[0] === '.') {
return false;
}
// only whitelisted extensions
$extension = strtolower(Lib::getExtension($originalFilename));
$allowedExtensions = $this->getAllowedUploadExtensions();
return in_array($extension, $allowedExtensions);
}