I have a simple array that contains the data I need but needs to be formatted a little differently:

It is currently 1 collection that holds an array of collections. However, I need to merge certain data points if they exists.

    [0] => [
        'name' => 'Test 1 Name',
        'districts' => [
            'district' => '0001',
            'zone' => 'blue'
        ],
        'name' => 'Test 2 Name',
        'districts' => [
            'district' => '0002',
            'zone' => 'red'
        ],
        'name' => 'Test 3 Name',
        'districts' => [
            'district' => '0003',
            'zone' => 'yellow'
        ],
        'name' => 'Test 4 Name',
        'districts' => [
            'district' => '0004',
            'zone' => 'black'
        ],
        'name' => 'Test 5 Name',
        'districts' => [
            'district' => '0001',
            'zone' => 'green'
        ],
    ]

As you can see the first district array and the last district array have the same district but different zones.

When that happens I need them to be merged into an array with the first district it finds that’s similar and remove the other.

Wanting these results on a collection dump:

    [0] => [
        'name' => 'Test 1 Name',
        'districts' => [
            'district' => '0001',
            'zone' => [
                'blue',
                'green'
            ]
        ],
        'name' => 'Test 2 Name',
        'districts' => [
            'district' => '0002',
            'zone' => 'red'
        ],
        'name' => 'Test 3 Name',
        'districts' => [
            'district' => '0003',
            'zone' => 'yellow'
        ],
        'name' => 'Test 4 Name',
        'districts' => [
            'district' => '0004',
            'zone' => 'black'
        ]
    ]

The name does not play a part in this and doesn’t matter. Added for basic data point.