if ($s) { echo "Name Changed \n"; echo "Updated Data Base\n"; $std->DisplayResult($rollno); } break; case 2: do { echo "Set Password :\n "; $password = readline(); } while ($password == null); $st1 = $obj->ChangePassword($userName, $password); if ($st1) { echo "Password changed :) \n"; echo "Updated Data Base\n"; $obj->DisplayUsers(); } break; case 3: $std->DisplayAllResults(); break; case 4: do { echo "Set UserName :\n "; $userName = readline(); #check username availability } while ($userName == null); do { echo "Set Password :\n "; $password = readline(); } while ($password == null);