} } else { if ($mode == 'addTest') { if (isset($_POST['test_class']) && $_POST['test_class'] != '' && isset($_POST['test_date']) && $_POST['test_date'] != '' && isset($_POST['school_class']) && $_POST['school_class'] != '' && isset($_POST['school_year']) && $_POST['school_year'] != '') { $test_date = $_POST['test_date']; $test_class = $_POST['test_class']; $school_class = $_POST['school_class']; $school_year = $_POST['school_year']; $checkIfExists = $database->testAlreadyExist($test_class, $test_date, $school_class, $school_year); if ($checkIfExists != false) { $data["success"] = 0; $data["error"] = 2; $data["message"] = "The test is already marked in the database!"; echo json_encode($data); } else { $action = $database->insertTest($test_class, $test_date, $school_class, $school_year); if ($action != false) { $data["success"] = 1; $data["error"] = 0; $data["message"] = "A new test was inserted in the database!"; echo json_encode($data); } else { $data["success"] = 0; $data["error"] = 1; $dat["message"] = "Something went wrong while inserting the test in the database!"; echo json_encode($data); } } } } else { if ($mode == 'deleteTest') {