Entity metadata wrapper, get field collection in field collection

Question

I want to get (and to set after) the value of a field collection in a field collection (multidimensional field content).

This is my code :

// The node is a custom content.

// I get the list of first collections fields.
$temp = field_collection_get($node,'field_top');
// Shows the structure you can see below in the screenshot.
dpm($temp->value()[0]);

// Now, I want to get the value of field_website_informations.
// I've tried several ways but I couldn't find the right way.
// The following line returns an error.
$testage = entity_metadata_wrapper($temp->value()[0], 'field_website_informations');

Is it possible to do with the Entity API?

The screenshot :

Answer 1

Yes it is possible. Let's say you have a content type with a field collection named field_collection_parent, which has a field collection in it named field_collection_child, which has a field in it named field_child.

// First you need to wrap the node with entity_metadata_wrapper
$node_wrapper = entity_metadata_wrapper('node', $node);

// To get the value of field_child:
$value = $node_wrapper
           ->field_collection_parent
           ->field_collection_child
           ->field_child
           ->value();

// UPDATE: If a field accepts multiple values, treat it like an array
// The following line would get the first value of field_collection_child in the 
// first field_collection_parent.
$value = $node_wrapper
           ->field_collection_parent[0]
           ->field_collection_child[0]
           ->value();

// To set/modify the value of field_child
$node_wrapper
  ->field_collection_parent
  ->field_collection_child
  ->field_child
  ->set('Some new value');

// To save the node after modifying
$node_wrapper->save();