1. Form API
Attila Cs. Nagy
March 14, 2013
Tuesday, March 26, 13

2. HTML form tag
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3. form tag
• <input>
• <textarea>
• <button>
• <select>
• <option>
• ...
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4. Why are we loving APIs?
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5. API
• Reusability
• Standard solutions
• Encapsulation
• Connection point
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6. hook system
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7. Tuesday, March 26, 13

8. module foo
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9. module foo
hook_bar
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10. module foo
function foo_bar() {
hook_bar
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11. Form API
http://api.drupal.org/api/drupal/developer%21topics
%21forms_api_reference.html/7
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12. Form API
• Generate HTML
• Handle security issues
• Validation
• Ajax
• States
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13. Form API
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14. Examples module
form_example
http://drupal.org/project/examples
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15. How does it work?
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16. hook_menu
http://api.drupal.org/api/drupal/modules%21system
%21system.api.php/function/hook_menu/7
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17. drupal_get_form($form_id);
http://api.drupal.org/api/drupal/includes%21form.inc/
function/drupal_get_form/7
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18. $form_state
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19. Tuesday, March 26, 13

20. Validation
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21. Validation
$form_id_validate($form, &$form_state) {
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22. #element_validate
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23. submit handling
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24. $form_id_submit($form, &$form_state) {
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25. hook_form_alter
http://api.drupal.org/api/drupal/modules%21system
%21system.api.php/function/hook_form_alter/7
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26. States API
http://api.drupal.org/api/examples/form_example
%21form_example_states.inc/function/
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27. system_settings_form
http://api.drupal.org/api/drupal/modules!system!
system.module/function/system_settings_form/7
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28. hook_element_info
http://api.drupal.org/api/drupal/modules%21system
%21system.api.php/function/hook_element_info/7
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29. Questions?
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30. Tuesday, March 26, 13