MySQL Database Backup

[systech44]

I wish to restore the data of tables of my database into Excel(.xls) or any other format. Below is my code.

<?php

mysql_connect("localhost","root","");
mysql_select_db("test");

$dbname    = "test";
$dbhost    = "localhost";
$dbuser    = "root";
$dbpass    = "";
$backupFile    = "restore";

$backupFile = $dbname . date("Y-m-d-H-i-s") . '.gz';
$command = "mysqldump --opt -h $dbhost -u $dbuser -p $dbpass $dbname | gzip > $backupFile";
system($command);

?>

There is no error. But I cannot see the output. Please tell me what is wrong with my code. Please rectify.

My environment is as below:
Windows XP
WampServer

Thanks a lot in advance.