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array-functions

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Some handy array functions

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# Some handy array functions

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This package provides some handy array functions.

Spatie is a webdesign agency in Antwerp, Belgium. You'll find an overview of all our open source projects [on our website](https://spatie.be/opensource).

## Support us

[<img src="https://github-ads.s3.eu-central-1.amazonaws.com/array-functions.jpg?t=1" width="419px" />](https://spatie.be/github-ad-click/array-functions)

We invest a lot of resources into creating [best in class open source packages](https://spatie.be/open-source). You can support us by [buying one of our paid products](https://spatie.be/open-source/support-us).

We highly appreciate you sending us a postcard from your hometown, mentioning which of our package(s) you are using. You'll find our address on [our contact page](https://spatie.be/about-us). We publish all received postcards on [our virtual postcard wall](https://spatie.be/open-source/postcards).

## Postcardware

You're free to use this package (it's [MIT-licensed](LICENSE.md)), but if it makes it to your production environment you are required to send us a postcard from your hometown, mentioning which of our package(s) you are using.

Our address is: Spatie, Kruikstraat 22, 2018 Antwerp, Belgium.

The best postcards will get published on the open source page on our website.

## Install

You can install this package via composer:

``` bash
composer require spatie/array-functions
```

## Usage

The following functions are provided in the `Spatie`-namespace:

### array_rand_value
```php
/**
 * Get a random value from an array.
 *
 * @param array $array
 * @param int $numReq  The amount of values to return
 * @return mixed
 */
function array_rand_value(array $array, $numReq = 1)
```

### array_rand_weighted
```php
/**
 * Get a random value from an array, with the ability to skew the results.
 * Example: array_rand_weighted(['foo' => 1, 'bar' => 2]) has a 66% chance of returning bar.
 * 
 * @param array $key
 * 
 * @return mixed
 */
function array_rand_weighted(array $array)
```

### values_in_array
```php
/**
 * Determine if all given needles are present in the haystack.
 *
 * @param array|string $needles
 * @param array $haystack
 *
 * @return bool
 */
function values_in_array($needles, array $haystack)
```

### array_keys_exist
```php
/**
 * Determine if all given needles are present in the haystack as array keys.
 * 
 * @param array|string $needles
 * @param array $haystack
 *
 * @return bool
 */
function array_keys_exist($needles, array $haystack)
```

### array_split_filter
```php
/**
 * Returns an array with two elements.
 * 
 * Iterates over each value in the array passing them to the callback function.
 * If the callback function returns true, the current value from array is returned in the first
 * element of result array. If not, it is return in the second element of result array.
 *
 * Array keys are preserved.
 *
 * @param array $array
 * @param callable $callback
 * @return array
 *
 */
function array_split_filter(array $array, callable $callback)
```

### array_split
```php
/**
 * Split an array in the given amount of pieces.
 *
 * @param array $array
 * @param int $numberOfPieces
 * @param bool $preserveKeys
 * @throws \InvalidArgumentException
 * @return array
 */
function array_split(array $array, $numberOfPieces = 2, $preserveKeys = false)
```

### array_merge_values
```php
/**
 * Returns an array with the unique values from all the given arrays
 *
 * @param \array[] $arrays
 * @return array
 */
function array_merge_values(array ... $arrays)
```

### array_flatten
```php
/**
 * Flatten an array of arrays. The `$levels` parameter specifies how deep you want to
 * recurse in the array. If `$levels` is -1, the function will recurse infinitely.
 *
 * @param array $array
 * @param int $levels
 *
 * @return array
 */
function array_flatten(array $array, $levels = -1)
```

## Change log

Please see [CHANGELOG](CHANGELOG.md) for more information what has changed recently.

## Testing

You can run the tests with:

```bash
vendor/bin/phpunit
```

## Contributing

Please see [CONTRIBUTING](https://github.com/spatie/.github/blob/main/CONTRIBUTING.md) for details.

## Security

If you've found a bug regarding security please mail [security@spatie.be](mailto:security@spatie.be) instead of using the issue tracker.

## Credits

- [Freek Van der Herten](https://github.com/freekmurze)
- [All Contributors](../../contributors)

## About Spatie
Spatie is a webdesign agency in Antwerp, Belgium. You'll find an overview of all our open source projects [on our website](https://spatie.be/opensource).

## License

The MIT License (MIT). Please see [License File](LICENSE.md) for more information.

array-functions

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