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Tương tác giữa PHP và jQuery - part 20

CHAPTER 5 ■ ADD CONTROLS TO CREATE, EDIT, AND DELETE EVENTS Generating a Delete Button To start, add a Delete button to the full view edit controls by modifying _adminEntryOptions() in the Calendar class with the code shown in bold: /** * Generates edit and delete options for a given event ID * * @param int $id the event ID to generate options for * @return string the markup for the edit/delete options */ private function _adminEntryOptions($id) { return ADMIN_OPTIONS; } This adds a button that sends the. | CHAPTER 5 ADD CONTROLS TO CREATE EDIT AND DELETE EVENTS Generating a Delete Button To start add a Delete button to the full view edit controls by modifying _adminEntryOptions in the Calendar class with the code shown in bold Generates edit and delete options for a given event ID @param int id the event ID to generate options for @return string the markup for the edit delete options private function _adminEntryOptions id return ADMIN_OPTIONS div class admin-options form action admin.php method post p input type submit name edit_event value Edit This Event input type hidden name event_id value id p form form action confirmdelete.php method post P input type submit name delete_event value Delete This Event input type hidden name event id value id p form div -- end .admin-options -- ADMIN_OPTIONS This adds a button that sends the user to a yet-to-be-created confirmation page called confirmdelete.php which you ll build later in this section. After saving the preceding changes you will see both edit and delete options when viewing a full event description see Figure 5-7 . 191 CHAPTER 5 ADD CONTROLS TO CREATE EDIT AND DELETE EVENTS Figure 5-7. The Delete button as it appears on the full event view Creating a Method to Require Confirmation When a user clicks the Delete button he is sent to a confirmation page that contains a form to make sure he really wants to delete the event. That form will be generated by a new public method in the Calendar class called confirmDelete . This method confirms that an event should be deleted by performing the following actions 1. Checks if the confirmation form was submitted and a valid token was passed. If so go to Step 2. If not go to Step 3. 2. Checks whether the button clicked was the Confirmation button. If so it deletes the event. If not it sends the user back out to the main calendar view. 3. It loads the event data and displays the confirmation form. You accomplish the preceding steps by adding the new method shown in bold to the .