Laravel Collection Public API: flip

flip

The flip method will return a new Collection instance where are the all the collection item's keys have been exchanged with their corresponding values.

The following code example demonstrates the effects of the flip method:

 1<?php
 2 
 3use Illuminate\Support\Collection;
 4 
 5// Create a new collection instance.
 6$collection = new Collection([
 7    'first'  => 'I am first',
 8    'second' => 'I am second',
 9    'third'  => 'I am third'
10]);
11 
12// Flip the original collection.
13$flippedCollection = $collection->flip();

The $flippedCollection variable will now contain a new instance of the Collection class with a structure similar to the following output:

1object(Illuminate\Support\Collection)[134]
2  protected 'items' =>
3    array (size=3)
4      'I am first'  => string 'first' (length=5)
5      'I am second' => string 'second' (length=6)
6      'I am third'  => string 'third' (length=5)

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