"); //initialize error messages array $errors = array(); //process switch( $action ) { case 'add': $new_task = filter_input(INPUT_POST, 'task'); //echo("t= $new_task
"); if (empty($new_task)) { $errors[] = 'The new task cannot be empty.'; } else { $task_list[] = $new_task; } break; case 'delete': $task_index = filter_input(INPUT_POST, 'taskid', FILTER_VALIDATE_INT); if ($task_index === NULL || $task_index === FALSE) { $errors[] = 'The task cannot be deleted.'; } else { unset($task_list[$task_index]); $task_list = array_values($task_list); } break; } include('task_list.php'); ?>