I am getting errors by my code, which I can see why, I wrote this a few years ago, is there a better way to do it?

sub Get_Page_Vars {
    my ($temp_vars,$type) = @_;
    my $sth = $dbh->prepare (qq{ SELECT `name`,`value`,`add_name` FROM
+ `page_vars` WHERE `type` = ? OR `type2` = ? ORDER BY add_name,id,d})
+;
    $sth->execute($type,$type);
    while(my ($db_name,$content,$_add_name) = $sth->fetchrow_array()) 
+{
        defined($content);
        $content =~ s/(\$[a-zA-Z0-9\{\'\}_]+)/ eval($temp_vars{$1}) /g
+e if $temp_vars{$1};
        $content =~ s/(\$[a-zA-Z0-9\{\'\}_]+)/ $temp_vars{eval($1)} /g
+e if $temp_vars{$1};
        $content =~ s/\<templ_var ([a-zA-Z0-9\{\'\}_]+)\>/ eval ($vars
+{$1}) /ge if $vars{$1};
        $content =~ s/\<templ_var ([a-zA-Z0-9\{\'\}_]+)\>/ $vars{eval(
+$1)} /ge if $vars{$1};
        $content =~ s/\<templ_var ([a-zA-Z0-9\{\'\}_]+)\>/ eval ($temp
+_vars{$1}) /ge if $temp_vars{$1};
        $content =~ s/\<templ_var ([a-zA-Z0-9\{\'\}_]+)\>/ $temp_vars{
+eval($1)} /ge if $temp_vars{$1};
        $content =~ s/\<templ_var ([a-zA-Z0-9\{\'\}_]+)\>/ eval ($1) /
+ge if $1;
        $content =~ s/{{([a-zA-Z0-9\{\'\}_]+)}}/ eval($vars{$1}) /ge i
+f $vars{$1};
        $content =~ s/{{([a-zA-Z0-9\{\'\}_]+)}}/ $vars{eval($1)} /ge i
+f $vars{$1};
        $content =~ s/(\$[a-zA-Z0-9\{\'\}_]+)/ eval($vars{$1}) /ge if 
+$vars{$1};
        $content =~ s/(\$[a-zA-Z0-9\{\'\}_]+)/ $vars{eval($1)} /ge if 
+$vars{$1};
        $content =~ s/(\$[a-zA-Z0-9\{\'\}_]+)/ eval($1) /ge;
        if ($content && ($content =~ /<code>/i && $content =~ /<\/code
+>/i)) {
            while($content =~ /<code>/i && $content =~ /<\/code>/i) {
                my ($code1,$code2,$_do_code);
                ($content,$code1) = split /<code>/, $content, 2;
                ($code2,$ocontent) = split /<\/code>/, $code1, 2;
                $_do_code = eval($code2);
                $content = $content . $_do_code . $ocontent;
            }
        }
        if ($content && ($content =~ /<syscode>/i && $content =~ /<\/s
+yscode>/i)) {
            while($content =~ /<syscode>/i && $content =~ /<\/syscode>
+/i) {
                my ($syscode1,$syscode2);
                ($content,$syscode1) = split /<syscode>/i, $content, 2
+;
                ($syscode2,$ocontent) = split /<\/syscode>/i, $syscode
+1, 2;
                eval{$syscode2};
                $content = $content . $ocontent;
            }
        }
        if ($_add_name) {
            $content = qq~<!--Start $db_name-->$content<!--End $db_nam
+e-->~;
        }
        $temp_vars{$db_name} = $content;
    }
    $sth->finish();
return(%temp_vars);
}
[download]

errors:

[Tue Sep 25 08:12:24 2007] web.cgi: Useless use of private variable in
+ void context at /path/to/user/readin_pagevars.cgi line 35. 
[Tue Sep 25 08:12:24 2007] web.cgi: Useless use of defined operator in
+ void context at /path/to/user/readin_pagevars.cgi line 7. 
[Tue Sep 25 08:12:24 2007] web.cgi: Useless use of defined operator in
+ void context at /path/to/user/vars_e_subs.conf line 36. 
[Tue Sep 25 08:12:24 2007] web.cgi: Useless use of defined operator in
+ void context at /path/to/user/vars_e_subs.conf line 38. 
[Tue Sep 25 08:12:24 2007] web.cgi: Unquoted string \"yr\" may clash w
+ith future reserved word at /path/to/user/vars_e_subs.conf line 103. 
[Tue Sep 25 08:12:24 2007] web.cgi: Useless use of defined operator in
+ void context at /path/to/user/vars_e_subs.conf line 344. 
[Tue Sep 25 08:12:24 2007] web.cgi: Useless use of defined operator in
+ void context at /path/to/user/vars_e_subs.conf line 346. 
[Tue Sep 25 08:12:24 2007] web.cgi: Useless use of defined operator in
+ void context at /path/to/user/vars_e_subs.conf line 348. 
[Tue Sep 25 08:12:24 2007] web.cgi: Useless use of defined operator in
+ void context at /path/to/user/vars_e_subs.conf line 350. 
[Tue Sep 25 08:12:25 2007] web.cgi: Compilation failed in require at w
+eb.cgi line 69. 
[Tue Sep 25 08:12:27 2007] Sess.pm: Ambiguous call resolved as CORE::o
+pen(), qualify as such or use & at /path/to/user/md/Sess.pm line 92. 
[Tue Sep 25 08:12:27 2007] Sess.pm: Ambiguous call resolved as CORE::o
+pen(), qualify as such or use & at /path/to/user/md/Sess.pm line 116.
+ 
[Tue Sep 25 08:12:27 2007] Sess.pm: Ambiguous call resolved as CORE::o
+pen(), qualify as such or use & at /path/to/user/md/Sess.pm line 126.
[download]

If I have variables in the database, is there a better way that will not give me those "Useless use of defined operator in void context at ..." errors?

I'm filling up my apache log with those errors, and I don't know a better way to do it. Any pointers would be most excellent!

Thank you,
John