foreach ($_FILES["logo"]["error"] as $key => $error) {
   if ($error == UPLOAD_ERR_OK) {
       $tmp_name = $_FILES["logo"]["tmp_name"][$key];
       $name = $_FILES["logo"]["name"][$key];
       move_uploaded_file($tmp_name, "images/data/$bus_id/logo/$name");
	   echo 'Filename: '.$name.' Has been uploaded<br>';
	   
	   $name_all[] = $name;

$logo_avail = (isset($name_all['0'])) ? 'Yes' : 'No';