function image_example_style_form

Form for uploading and displaying an image using selected style.

This page provides a form that allows the user to upload an image and choose a style from the list of defined image styles to use when displaying the the image. This serves as an example of integrating image styles with your module and as a way to demonstrate that the styles and effects defined by this module are available via Drupal's image handling system.

See also

theme_image_style()

Related topics

File

image_example/image_example.pages.inc, line 21

Code

function image_example_style_form($form, &$form_state) {
    // If there is already an uploaded image display the image here.
    if ($image_fid = variable_get('image_example_image_fid', FALSE)) {
        $image = file_load($image_fid);
        $style = variable_get('image_example_style_name', 'thumbnail');
        $form['image'] = array(
            '#markup' => theme('image_example_image', array(
                'image' => $image,
                'style' => $style,
            )),
        );
    }
    // Use the #managed_file FAPI element to upload an image file.
    $form['image_example_image_fid'] = array(
        '#title' => t('Image'),
        '#type' => 'managed_file',
        '#description' => t('The uploaded image will be displayed on this page using the image style chosen below.'),
        '#default_value' => variable_get('image_example_image_fid', ''),
        '#upload_location' => 'public://image_example_images/',
    );
    // Provide a select field for choosing an image style to use when displaying
    // the image.
    $form['image_example_style_name'] = array(
        '#title' => t('Image style'),
        '#type' => 'select',
        '#description' => t('Choose an image style to use when displaying this image.'),
        // The image_style_options() function returns an array of all available
        // image styles both the key and the value of the array are the image
        // style's name. The function takes on paramater, a boolean flag
        // signifying whether or not the array should include a <none> option.
'#options' => image_style_options(TRUE),
        '#default_value' => variable_get('image_example_style_name', ''),
    );
    // Submit Button.
    $form['submit'] = array(
        '#type' => 'submit',
        '#value' => t('Save'),
    );
    return $form;
}