my %dbhash = (
  name  => 'revdiablo',
  prize => 'pony',

);

my $template = 'Hello $dbhash{name}, you won a $dbhash{prize}.';

#$template =~ s/\$dbhash{([^}]+)}/$dbhash{$1}/ge; # unnecessary
$template =~ s/\$dbhash{([^}]+)}/$dbhash{$1}/g;

print "$template\n";