Laravel 5 Collections: Filtering Collections Based On Value Presence With intersect

The intersect removes any values that are not in the provided $items array. The intersect method returns a new instance of Collection. The intersect method preserves any keys from the original collection.

The behavior of the intersect method is similar to PHP's array_intersect function.

#Signature

1public function intersect(
2    $items
3);

#Example Use

The following code example highlights the usage of the intersect method:

 1use Illuminate\Support\Collection;
 2 
 3// Create a new collection instance.
 4$collection = new Collection([
 5    'first', 'second', 'third'
 6]);
 7 
 8// An empty collection will be returned.
 9$intersected = $collection->intersect(['fourth']);
10 
11// A collection only containing the 'third' value will
12// be returned.
13$intersected = $collection->intersect(['fourth', 'third']);

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