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Check out the Form API reference, especially the part about select lists: <?php $form['selected'] = array( '#type' => 'select', '#title' => t('Selected'), '#options' => array( …

Try printing the form variables with PHP function print_r. function hook_form_alter(&$form, &$form_state, $form_id) { print_r($form); } When you visit the page the form is on, the variables (and …

Add a select list to your form. Add some #ajax to your textfield. Every time the textfield changes content, add the value (via #ajax) to your select list. Use the values of your select list in the sub …

Assuming you know about file status, file_save & file_usage_add. In your submit callback: $file = file_load($form_state['values']['image_fid']); $file->filename = 'somefilename'; $file->status = FIL …

$form['picture']['file'] = array( '#type' => 'managed_file', '#title' => t('picture'), '#description' => t('Allowed extensions: gif png jpg jpeg'), '#default_value' => (isset($foo->picture->fi …

I am writing a form using the Drupal 7 form API. On submitting the form (via AJAX), the following error is displayed: An AJAX HTTP error occurred. HTTP Result Code: 500 Debugging information f …

The solution is to add a call to file_usage_add after the file is saved. This call adds a reference to the file in the database. The file_managed_file_validate function will spot the reference and won …

Something like this: foreach ($images as $image) { // New array for readability $options = array( 'path' => $image->url, 'alt' => $image->alt, ); // Push the image tag onto the item …

I need to add some AJAX functionality to a node form. Using hook_form_alter I'm overriding form elements. In this particular case I need to add a callback on the 'language' element provided by the tra …

I am having some issues with the managed_file type. Whenever I try to edit and save a form that has a managed_file element in it an error occurs: The file used in the Picture field may not be referen …

I can't get a form to display a (default?) value after an AJAX call. I am using the following code: function foo_form ($form, &$form_state, $foo) { $form['#prefix'] = '<div id="foo-form-wrapper">' …

Is there a way to change the order of execution of hook_form_alter in Drupal 7 without changing a module's weight or hacking Drupal Core? I am trying to alter the element added in translation_form_no …

If you're using a template file you can hide stuff using hide(). If you want to hide a form element in hook_form_alter, unset() might be your best option. If it's just to store a value you could use …

I have a form that has both a managed_file element and a text_format element. Both are encapsulated in a wrapper div (using #prefix and #suffix). On submit, an AJAX callback is executed and both eleme …