Laravel Collection Public API: filter

filter(callable $callback = null)

The filter method applies a filter to the collection. An optional $callback can be supplied to the filter method. If no $callback is supplied to the filter method, any value in the collection that evaluates to false will be removed from the final collection. Supplying a $callback allows developers to provide their own truth tests to determine if a value should be included in the final collection that is returned. The filter method returns a modified copy of the original Collection instance and does not modify the original collection.

 1<?php
 2 
 3use Illuminate\Support\Collection;
 4 
 5// Create a new collection instance.
 6$collection = new Collection([
 7    'first', 'second', '0', null
 8]);
 9 
10// ['first', 'second']
11$filtered = $collection->filter();
12 
13// ['0', null]
14$filtered = $collection->filter(function($item) {
15    return $item == false;
16});
17 
18// ['second']
19$filtered = $collection->item(function($item) {
20    return (strlen($item) >= 6);
21});

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