//Activate the account: if ($user->query("UPDATE `{$user->dbTable}` SET `{$user->tbFields['active']}` = 1 WHERE `activationHash` = '$hash' LIMIT 1", __LINE__)) echo 'Account activated. You may login now'; else echo 'Unexpected error. Please contact an administrator'; } }else{ echo 'User account does not exists'; } } if (!empty($_POST['username'])){ //Register user: //Get an activation hash and mail it to the user $hash = $user->randomPass(100); while( mysql_num_rows($user->query("SELECT * FROM `{$user->dbTable}` WHERE `activationHash` = '$hash' LIMIT 1"))==1)//We need a unique hash $hash = $user->randomPass(100); //Adding the user. The logic is simple. We need to provide an associative array, where keys are the field names and values are the values :) $data = array( 'username' => $_POST['username'], 'email' => $_POST['email'], 'password' => $_POST['pwd'], 'activationHash' => $hash, 'active' => 0 ); $userID = $user->insertUser($data);//The method returns the userID of the new user or 0 if the user is not added if ($userID==0) echo 'User not registered';//user is allready registered or something like that else { echo 'User registered with user id '.$userID. '. Activate your account using the instructions on your mail.';