// check if a user has a specific role

public function hasRole($role_name) {

    return isset($this->roles[$role_name]);

}

​

// insert a new role permission association

public static function insertPerm($role_id, $perm_id) {

    $sql = "INSERT INTO role_perm (role_id, perm_id) VALUES (:role_id, :perm_id)";

    $sth = $GLOBALS["DB"]->prepare($sql);

    return $sth->execute(array(":role_id" => $role_id, ":perm_id" => $perm_id));

}

​

// delete ALL role permissions

public static function deletePerms() {

    $sql = "TRUNCATE role_perm";

    $sth = $GLOBALS["DB"]->prepare($sql);

    return $sth->execute();

}