- $r = q("SELECT `hidewall` FROM `user` WHERE `user`.`nickname` = '%s' LIMIT 1",
- dbesc($a->argv[1])
- );
- if(count($r) && $r[0]['hidewall'])
- killme();
+ $user = '';
+ if($a->argc > 1) {
+ $r = q("SELECT `hidewall`,`nickname` FROM `user` WHERE `user`.`nickname` = '%s' LIMIT 1",
+ dbesc($a->argv[1])
+ );
+ if((! count($r)) || (count($r) && $r[0]['hidewall']))
+ killme();
+ $user = $r[0]['nickname'];
+ }