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

Try this:

$DBUSER="user";
$DBPASSWD="password";
$DATABASE="DBname";

$filename = "backup-" . date("d-m-Y") . ".sql";

$command = '"C:\Program Files\MySQL\MySQL Server 5.5\bin\mysqldump.exe" '.$DATABASE ." -u".$DBUSER ." -p".$DBPASSWD." > your_web_site/$filename";
passthru($command);

• Change the route to the direction of the mysqldump.exe application of your computer.
• Respect the " " inside the command.

Then force the download of the file:

if (file_exists("your_web_site/".$filename)) {
header('Content-Description: File Transfer');
header('Content-Type: application/octet-stream');
header('Content-Disposition: attachment; filename="'.basename($filename).'"');
header('Expires: 0');
header('Cache-Control: must-revalidate');
header('Pragma: public');
readfile("your_web_site/".$filename);
exit;
}

Edit: You have to give permissions to the folder where you keep copies.