DB backup in cron is creating a file with zero byte - database

Question

I have set up a cron in my godaddy server for taking DB backup. For Testing purpose, I run the cron in every minute. The command is :
mysqldump tuniv_results > /home/username/public_html/DB-VVS/tuniv_results.sql
In my DB-VVS folder one file, tuniv_results.sql, is creating but it is of zero byte. Could you please let me know the issue, why it is not creating properly?
Thanks in advance.
------------UPDATE-------------------
$user="****";
$password="****";
$database="*****";
$dumpCommand='/usr/bin/mysqldump';
$dumpCommand.=" -e -f -h <ipaddress> -u$user -p$password";
$dumpCommand.=" $database";
$dumpCommand.=" > bekap.sql";
$results=$dumpCommand;
exec($dumpCommand);
echo "result: ".$results;
I create a file in the root folder and put the absolute path of that file in the Command text-field as /home/username/cronfile.php. But in the root file there is no file like bekap.sql. Please let me know what might be the issue.

Answer 1

Try this one :
$user="*********";
$password="*****";
$database="*********";
$dumpCommand='/usr/bin/mysqldump';
$dumpCommand.=" -e -f -h host.name.com -u$user -p$password";
$dumpCommand.=" $database";
$dumpCommand.=" > bekap.sql";
$results=$dumpCommand;
exec($dumpCommand);
echo "result: ".$results;
Another solution :
I think this will help to you.
Open terminal and type:
sudo tcsh
pico /etc/crontab
or
nano /etc/crontab
And add one of the following lines depending on your situation. This schedule the backup on 1am every day.
Remote Host Backup with linked PATH to mysqldump:
0 1 * * * mysqldump -h mysql.host.com -uusername -ppassword --opt database > /path/to/directory/filename.sql
Remote Host Backup:
0 1 * * * /usr/local/mysql/bin/mysqldump -h mysql.host.com -uusername -ppassword --opt database > /path/to/directory/filename.sql
Local Host mysql Backup:
0 1 * * * /usr/local/mysql/bin/mysqldump -uroot -ppassword --opt database > /path/to/directory/filename.sql
(There is no space between the -p and password or -u and username - replace root with a correct database username.)