Laravel 5 Collections: Retrieving a Subset Of a Collections Elements With only

The only method is the logical opposite of the except method. The only method is used to return all the key/value pairs in the collection where the keys in the collection are in the supplied $keys array.

If the argument supplied for $keys evaluates to null, a copy of the original collection is returned.

#Signature

1public function only(
2    $keys
3);

#Example Use

Using the same example from the except method section, we can get only the first_name and last_name of the users in a collection:

 1// Create a new collection.
 2$collection = collect([
 3    'first_name' => 'John',
 4    'last_name'  => 'Doe',
 5    'password'   => 'some_password'
 6]);
 7
 8// Retrieve only the first and last
 9// names from the collection.
10$data = $collection->only(['first_name', 'last_name']);

After the above code has executed, the $data variable would contain a value similar to the following output:

1Collection {
2  #items: array: [
3    "first_name" => "John"
4    "last_name"  => "Doe"
5  ]
6}

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