my %user;
eval {
    my $session_id = $cgi->cookie( -name => 'mycookie', -path => '/' );
    tie %user, 'Apache::Session::DB_File', $session_id, { 'FileName' => '.sessions' };
};
croak( 'Cannot retrieve user session ID from client-side cookie' ) if $@;

foreach (0..$#{$user{'links'}}) {
    if ($cgi->param('link_'.$_)) {
        splice(
            @{$user{'links'}},
            $_,
            1
        )
    }
}