use strict;
sub test {
    if( $_[0] =~ /regex/ ) {
        $_[1] = "match";
    }
    else {
        $_[1] = "no match";
    }
}

my $bool;

test( "foo", $bool );
print "foo: $bool\n";

test( "regex", $bool );
print "regex: $bool\n";

##</code><code>##

use strict;
{
    my $foo;
    sub setFoo{
        $foo = shift;
    }
    sub getFoo{
        return $foo;
    }
}