php exec() - mysqldump creates an empty file

Question

I want to create a backup from a database, but I get only a blank file.

include(\'config.php\');

$command = \"mysqldump --opt -h \".$_host.\" -u \".$_user.\         


        

Answer 1

Take the variables out of the quotes and remove --opt.

Also make sure that you are having unique file names

$backupfile = $dbname . date("Y-m-d-H-i-s") . '.sql';

$command = "D:\xampp\mysql\bin\mysqldump -u $_user -p$_pass $_db > $backupfile";

system($command);