Question

How can we do mysqldump to another DB using php script such that triggers do not get dumped along with that?

Answer 1

Something like this should work:

$db_name = "db";
$outputfile = "/somewhere";
$new_db_name = 'newdb';

$cmd = 'mysqldump --skip-triggers %s > %s  2>&1';
$cmd = sprintf($cmd, escapeshellarg($db_name), escapeshellcmd($output_file));
exec($cmd, $output, $ret); 
if ($ret !=0 ) {
    //log error message in $output
}

Then to import:

$cmd = 'mysql --database=%s < %s 2>&1';
$cmd = sprintf($cmd, escapeshellarg($new_db_name), escapeshellcmd($output_file));
exec($cmd, $output, $ret); 
//etc.

unlink($outputfile);

Note that the new database will need to be created first. You will also probably need to specify a username and password to each command.

edit

You could also do this in one command e.g.

exec('mysqldump --skip-triggers sourcedb | mysql --database targetdb 2>&1', $output, $return);