Laravel Collection Public API: diff

diff($items)

The diff method is used to determine which items in the collection are not present in the supplied $items collection. $items can be be either an array, or another instance of Collection. The diff method returns a new instance of Collection.

The following examples will demonstrate the usage of the diff:

 1<?php
 2 
 3use Illuminate\Support\Collection;
 4 
 5// Create the first collection instance.
 6$firstCollection = new Collection([
 7    'first', 'second', 'third'
 8]);
 9 
10// Create the second collection instance.
11$secondCollection = new Collection([
12    'third', 'fourth', 'fifth'
13]);
14 
15// ['first', 'second']
16$firstCollection->diff(['third', 'fourth', 'fifth']);
17 
18// ['first', 'second']
19$firstCollection->diff($secondCollection);
20 
21// ['fourth', 'fifth']
22$secondCollection->diff($firstCollection);

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