(PHP) Multi Level Array Iterator

There are times when there is a need to iterate over an array being unknown about the level of nested array it contains. Multi Level Array Iterator lets u do that. This functionality supports associative array and is properly tested.

Basic Usage

$array = [
    1,
    2,
    [
        3,
        4
    ],
    [
        5,
        6,
        [
            7,
            8
        ]
    ],
    [
        9,
        [
            [
                10
            ]
        ],
        11
    ]
];

foreach(\ArrayIterator\ArrayIteratorFacade::iterate($array) as $key => $ArrayItem)
{
    echo $key . ' - ' . $ArrayItem->getValue() . "\n";
}

Result:
    0 - 1
    1 - 2
    0 - 3
    1 - 4
    0 - 5
    1 - 6
    0 - 7
    1 - 8
    0 - 9
    0 - 10
    2 - 11

\ArrayIterator\ArrayIteratorFacade::iterate($array) returns a generator of ArrayElementInterface.

ArrayElementInterface provides

1. getValue():mixed
2. getKeyHierarchy():KeyHierarchyInterface
   • getParentKey(int $parentLevel): string
   • getHierarchyLevel(): int

New instance of \ArrayIterator\Iterator\ArrayIterator can be created with \ArrayIterator\ArrayIteratorFactory which is accessible through \ArrayIterator\ArrayIteratorLocator. Both the facade or locator way can be used to get an instance of ArrayIterator.

It includes special support for laravel framework. For its integration with Laravel's dependency injection container \ArrayIterator\ArrayIteratorServiceProvider is available which can be included in the lists of service providers in config/app.php. After this, type hinting \ArrayIterator\ArrayIteratorFactory anywhere inside laravel app will resolve into \ArrayIterator\ArrayIteratorFactory properly.

Note: - For debugging purpose, echoing KeyHierarchyInterface prints out string representation of keys hierarchy starting from root array separated by '-'. - Upgraded to php7