Create a new image field.
$name: The name of the new field (all lowercase), exclude the "field_" prefix.
$type_name: The node type that this field will be added to.
$field_settings: A list of field settings that will be added to the defaults.
$instance_settings: A list of instance settings that will be added to the instance defaults.
$widget_settings: A list of widget settings that will be added to the widget defaults.
function createImageField($name, $type_name, $field_settings = array(), $instance_settings = array(), $widget_settings = array()) {
$field = array(
'field_name' => $name,
'type' => 'image',
'settings' => array(),
'cardinality' => !empty($field_settings['cardinality']) ? $field_settings['cardinality'] : 1,
);
$field['settings'] = array_merge($field['settings'], $field_settings);
field_create_field($field);
$instance = array(
'field_name' => $field['field_name'],
'entity_type' => 'node',
'label' => $name,
'bundle' => $type_name,
'required' => !empty($instance_settings['required']),
'description' => !empty($instance_settings['description']) ? $instance_settings['description'] : '',
'settings' => array(),
);
$instance['settings'] = array_merge($instance['settings'], $instance_settings);
$field_instance = field_create_instance($instance);
entity_get_form_display('node', $type_name, 'default')
->setComponent($field['field_name'], array(
'type' => 'image_image',
'settings' => $widget_settings,
))
->save();
entity_get_display('node', $type_name, 'default')
->setComponent($field['field_name'])
->save();
return $field_instance;
}