Each call to dbConnect() will open a new connection to the database. One way of connecting only once is to declare the $dbh var as global to your package, and call dbConnect only once:
my $dbh = dbConnect();
sub dbConnect {
my $dsn = "DBI:mysql:database:localhost";
my $db_user_name = 'username';
my $db_password = 'password';
$dbh = DBI->connect
($dsn, $db_user_name, $db_password, {RaiseError => 1}) ||
die("cannot connect to DB: ".DBI::errstr."\n",$dbh);
}
sub foo {
# Can still see $dbh in here
my $sth = $dbh->prepare(...);
}
Of course, this means you're connecting to the DB every time the script's called (which might not be necessary), and you won't be able to access $dbh from outside of this package (probably a good thing though, I prefer to confine all DB related stuff to one package, or at least one hierarchy of classes. The next step after this is Class::DBI).
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