<?php
function link_image_field_formatter_info() {
  return array(
    'link_image' => array(
      'label' => t('Display the link as an image tag <img>'),
      'field types' => array('link_field'),
      'multiple values' => FIELD_BEHAVIOR_DEFAULT,
    ),
  );  
}

function link_image_field_formatter_view($entity_type, $entity, $field, $instance, $langcode, $items, $display) {
  $elements = array();
  foreach ($items as $delta => $item) {
    $elements[$delta] = array(
      '#markup' => theme('link_image_formatter_'. $display['type'], array('element' => $item, 'field' => $instance)),
    );
  }
  return $elements;
}

//Fonction de theme qui permet la generation d'une liste en ligne ou chaque item est séparer par une virgule
function link_image_theme(){
	return array(
		'link_image_formatter_link_image' => array(
          'variables' => array('element'=>NULL)
        )
   );
}

function theme_link_image_formatter_link_image($element){
	if($element['element']['url']!=''){
		return theme(
            'image',
            array(
                'path'=>$element['element']['url'],
                'alt'=>$element['element']['title'],
                'title'=>$element['element']['title'],
                'attributes'=>$element['element']['attributes']
            )
            
        );
	}
	else return '';
}