$user_id = 123; $group_id = 456; if(isInGroup($user_id, $group_id)) { echo "User $user_id is a member of group $group_id."; } else { echo "User $user_id is not a member of group $group_id."; }
$users = array(123, 456, 789); $group_id = 456; foreach($users as $user_id) { if(isInGroup($user_id, $group_id)) { echo "User $user_id is a member of group $group_id."; } else { echo "User $user_id is not a member of group $group_id."; } }This code checks whether each user in the array is a member of group with ID 456, and displays a message for each one. The isInGroup function is not part of the PHP core library, but it may be included in third-party packages, such as the Zend Framework or Laravel.