View Student Card

Warning (2): Undefined array key "" [APP/Plugin/Iot/View/IotStudentCards/view.ctp, line 69]
Code Context
                            <?php

                                $gender_arr = array('male' => 'Male', 'female' => 'Female');

                                echo $gender_arr[$student['IotStudent']['gender']];
include - APP/Plugin/Iot/View/IotStudentCards/view.ctp, line 69
View::_evaluate() - CORE/Cake/View/View.php, line 971
View::_render() - CORE/Cake/View/View.php, line 933
View::render() - CORE/Cake/View/View.php, line 473
MooView::render() - APP/View/MooView.php, line 807
Controller::render() - CORE/Cake/Controller/Controller.php, line 973
AppController::render() - APP/Controller/AppController.php, line 1148
Dispatcher::_invoke() - CORE/Cake/Routing/Dispatcher.php, line 200
Dispatcher::dispatch() - CORE/Cake/Routing/Dispatcher.php, line 167
[main] - APP/webroot/index.php, line 80