Help running MYSQLDUMP

I’m new to Infinity free and have successfully ported my website and sql database. However I have a script which runs a mysqldump daily which I can’t get working. partial extract below:

$command=‘mysqldump -h ’ .$mysqlHostName .’ -u ’ .$mysqlUserName .’ -p’ .$mysqlPassword .’ ’ .$mysqlDatabaseName .’ -r ’ .$mysqlExportPath;

echo “
$command
”;

exec($command,$output,$worked);

I get a NULL return which implies that the command has failed but no further information.

Any help gratefully received.

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