Drupal Course 2013 - Form API

Form APIAttila Cs. NagyMarch 14, 2013

Tuesday, March 26, 13

HTML form tagTuesday, March 26, 13

form tag

• <input>

• <textarea>

• <button>

• <select>

• <option>

• ...

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Why are we loving APIs?

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API

• Reusability

• Standard solutions

• Encapsulation

• Connection point

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hook system

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module foo

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module foo

hook_bar

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module foo

function foo_bar() {

hook_bar

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Form APIhttp://api.drupal.org/api/drupal/developer%21topics

%21forms_api_reference.html/7

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Form API

• Generate HTML

• Handle security issues

• Validation

• Ajax

• States

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Form APITuesday, March 26, 13

Examples moduleform_examplehttp://drupal.org/project/examples

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How does it work?Tuesday, March 26, 13

hook_menuhttp://api.drupal.org/api/drupal/modules%21system

%21system.api.php/function/hook_menu/7

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drupal_get_form($form_id);http://api.drupal.org/api/drupal/includes%21form.inc/

function/drupal_get_form/7

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$form_stateTuesday, March 26, 13

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Validation

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Validation

$form_id_validate($form, &$form_state) {

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#element_validateTuesday, March 26, 13

submit handlingTuesday, March 26, 13

$form_id_submit($form, &$form_state) {

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hook_form_alterhttp://api.drupal.org/api/drupal/modules%21system

%21system.api.php/function/hook_form_alter/7

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States APIhttp://api.drupal.org/api/examples/form_example

%21form_example_states.inc/function/

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system_settings_formhttp://api.drupal.org/api/drupal/modules!system!system.module/function/system_settings_form/7

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hook_element_infohttp://api.drupal.org/api/drupal/modules%21system%21system.api.php/function/hook_element_info/7

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Questions?

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