Prevented an unwanted file upload

// Checking file types of the uploaded file with known mime types list to prevent uploading unwanted files
if(isset($_FILES) && count($_FILES)) {
   require_once BASEDIR.'includes/mimetypes_include.php';
   $mime_types = mimeTypes();
   foreach($_FILES as $each) {
      if(isset($each['name']) && strlen($each['tmp_name'])) {
         $file_info = pathinfo($each['name']);
         $extension = $file_info['extension'];
         if(array_key_exists($extension, $mime_types)) {
            //An extension may have more than one mime type
            if(is_array($mime_types[$extension])) {
               //We should check each extension one by one
               $valid_mimetype = false;
               foreach($mime_types[$extension] as $each_mimetype) {
                  //If we have a match, we set the value to true and break the loop
                  if($each_mimetype==$each['type']) {
                     $valid_mimetype = true;
                     break;
                  }
               }

               if(!$valid_mimetype) {
                  die('Prevented an unwanted file upload attempt!');
               }
               unset($valid_mimetype);
            } else {
               if($mime_types[$extension]!=$each['type']) {
                  die('Prevented an unwanted file upload attempt!');
               }
            }
         } /*else { //Let's disable this for now
            //almost impossible with provided array, but we throw an error anyways
            die('Unknown file type');
         }*/
         unset($file_info,$extension);
      }
   }
   unset($mime_types);
}