[Black Snow]

If this doesn't work:

$webspace_canuse_global = '6,7,18';

if (!is_member_of($vbulletin->userinfo, $webspace_canuse_global))  {
    print_no_permission();
}else{

// do the script

Try this:

$webspace_canuse_global = '6,7,18';

if (!is_member_of($vbulletin->userinfo, explode(',', $webspace_canuse_global))) {
    print_no_permission();
}else{

// do the script

--------------- Added [DATE]1433941567[/DATE] at [TIME]1433941567[/TIME] ---------------

Oh, and keep the numbers seperated by commas only. Not commas and spaces.