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my $str;
my $GROUP = getNodeWhere("createtime > DATE_SUB(now(),INTERVAL 24 HOUR
+) AND
author_user = $$USER{user_id}", 'photo', 'photodatetime');
$str .= showphotogroup(@$GROUP);
return $str;

my $str;
my $GROUP = $$NODE{group};
$str .= showphotogroup(@$GROUP);
$str;

my @GROUP = @_;

...

$str .= "</ol>";
$str;