PHP MySQL PDO: non-working zerofill columns

<?php
require "Include/vars.php";

/**
 * MysqlQuery Executes SQL query and returns PDO result object.
 * @param $SqlQuery The SQL query to be executed.
 * @return PDO result object on success, false on failure.
 */
function MysqlQuery($SqlQuery)
{
   global $MysqlPDO;
   require "Include/vars.php";

   try
   {
      $SqlResult = $MysqlPDO->prepare($SqlQuery);
      $SqlResult->execute();
   }
   catch(Exception $Exception)
   {
      $SQLError = $Exception->getMessage();
      return false;
   }
   return $SqlResult;
}

try
{
   $MysqlPDO = new PDO("mysql:host=localhost;dbname=$db_name",$db_username,$db_password);
   $MysqlPDO->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
   $MysqlPDO->setAttribute(PDO::ATTR_EMULATE_PREPARES, false);
   //$MysqlPDO->setAttribute(PDO::ATTR_STRINGIFY_FETCHES, true);
}
catch(Exception $Exception)
{
   $PDOError = $Exception->getMessage();
   $ErrorString = "<b>A fatal MySQL error occured</b>.\n<br />Error: $PDOError";
   die($ErrorString);
}

$DropTableQuery = "DROP TABLE test";
$DropTableResult = MysqlQuery($DropTableQuery);

$CreateTableQuery = "CREATE TABLE test (
                    `Id` tinyint(4) unsigned zerofill NOT NULL,
                    `UserName` varchar(4) NOT NULL,
                    `TestDecimal` decimal(6,0) unsigned zerofill DEFAULT NULL,
                    PRIMARY KEY (`Id`)
                  ) ENGINE=InnoDB DEFAULT CHARSET=utf8";
$CreateTableResult = MysqlQuery($CreateTableQuery);

$InsertQuery = "INSERT INTO test (Id,UserName,TestDecimal) VALUES(1,'alex',2)";
$InsertResult = MysqlQuery($InsertQuery);

$SqlQuery = "SELECT Id,UserName,TestDecimal FROM test";


$SqlResult = MysqlQuery($SqlQuery); //execute query using PDO
echo "Result using PDO:";
var_dump($SqlResult->fetch());
$MysqlPDO = null; //disconnect

mysql_connect($db_server,$db_username,$db_password);
mysql_select_db($db_name);
$Sql_Result = mysql_query($SqlQuery);
echo "Result using mysql_ functions:";
var_dump(mysql_fetch_array($Sql_Result));
mysql_close();

?>