// Security checks.
if (!$user_details || // No details.
- $user_details['team_id'] <> $user->team_id || // User not in team.
$user_details['rank'] > $user->rank || // User has a bigger rank.
($user_details['rank'] == $user->rank && $user_details['id'] <> $user->id) // Same rank but not us.
) {