FluentArray

• Introduction
• Installation
• Configuration
• Macros
• Fixed methods
• Dynamic methods
• Implemented interfaces
• Code Formatting

Introduction

The fluent array library provides you with a convenient chainable interface. If you like object-oriented syntax or you just want to have more readable array declaration, the fluent array is at your service.

Basic usage

$order = (new FluentArray())
    ->user()
        ->id(1)
        ->name('John')
    ->end()
    ->coupon('SALE10')
    ->status('delivered')
    ->products()
        ->push()
            ->id(1)
            ->name('iPhone X')
            ->price(1200)
        ->end()
        ->push()
            ->id(2)
            ->name('Beats By Dre Studio3')
            ->price(360)
        ->end()
    ->end();

If we convert the fluent array to an associative array, by calling $order->toArray(), we will get the following output:

[
    'user' => [
        'id' => 1,
        'name' => 'John'
    ],
    'coupon' => 'SALE10',
    'status' => 'delivered',
    'products' => [
        [
            'id' => 1,
            'name' => 'iPhone X',
            'price' => 1200
        ],
        [
            'id' => 2,
            'name' => 'Beats By Dre Studio3'
            'price' => 360
        ]
    ]
]

Storage array

Every time you call set or get, or any other method, that modifies or retrieves the state, you update the internal storage of fluent array.

$fluentArray = new FluentArray();

// we set the key `one` and the corresponding value `1` in the storage 
$fluentArray->set('one', 1);
    
// we get the value, that corresponds the key `one` from the storage
$fluentArray->get('one');

Installation

Use composer to install the library:

composer require babenkoivan/fluent-array

Configuration

The configuration allows you to change a fluent array behavior and add new functionality.

Local scope

To configure a specific fluent array instance use local scope.

$config = (clone FluentArray::globalConfig())
    ->namingStrategy(new CamelCaseStrategy());

$fluentArray = (new FluentArray($config))
    ->one(1)
    ->two(2);

// alternatively you can set configuration, using the `config` method
$fluentArray = (new FluentArray())
    ->config($config)
    ->one(1)
    ->two(2);

$fluentArray->all();
// ['One' => 1, 'Two' => 2]

Global scope

To configure all fluent arrays use global scope.

$globalConfig = FluentArray::globalConfig();

$globalConfig->namingStrategy(new CamelCaseStrategy());

$fluentArray = (new FluentArray())
    ->one(1)
    ->two(2);
    
$fluentArray->all();
// ['One' => 1, 'Two' => 2]    

Macros

You can use macros to extend a fluent array functionality. It can be done via configuration in global or local scope.

$globalConfig = FluentArray::globalConfig();

$globalConfig
    ->macros()
        ->format(function (string $key, int $decimals = 0) {
            $value = $this->get($key);
        
            if (is_numeric($value)) {
                return number_format($value, $decimals);
            } else {
                return $value;
            }
        })
    ->end();
    
$fluentArray = (new FluentArray())
    ->set('one', 10.567)
    ->set('two', 2.89);
    
$fluentArray->format('one', 2);
// 10.57

$fluentArray->format('two', 1);
// 2.9    

Naming strategies

Naming strategies describe key transformation in dynamic methods.

For example, we want all our keys to be underscored in the storage array.

$config = (clone FluentArray::globalConfig())
    ->namingStrategy(new UnderscoreStrategy());

$fluentArray = (new FluentArray($config))
    ->firstValue(1)
    ->secondValue(2);

$fluentArray->all();
// ['first_value' => 1, 'second_value' => 2]

Now we want them to be camel-cased.

$config = (clone FluentArray::globalConfig())
    ->namingStrategy(new CamelCaseStrategy());

$fluentArray = (new FluentArray($config))
    ->firstValue(1)
    ->secondValue(2);

$fluentArray->all();
// ['first_value' => 1, 'second_value' => 2]

The supported naming strategies are:

Strategy	Example
CamelCaseStrategy	MyValue
NullStrategy	myValue
UnderscoreStrategy	my_value

The default naming strategy is UnderscoreStrategy.

Fixed methods

• all
• clean
• config
• count
• each
• filter
• first
• fromArray
• fromJson
• get
• globalConfig
• has
• keys
• krsort
• ksort
• last
• map
• pluck
• pushWhen
• push
• rsort
• setWhen
• set
• sort
• toArray
• toJson
• unset
• usort
• values
• when

all

The all method returns the storage array.

$fluentArray = (new FluentArray())
    ->set('one', 1)
    ->set('two', 2);
    
$fluentArray->all();    
// ['one' => 1, 'two' => 2]

clean

The clean method removes all keys and values from the storage array.

$fluentArray = (new FluentArray())
    ->set('one', 1)
    ->set('two', 2);

$fluentArray->all();    
// ['one' => 1, 'two' => 2]

$fluentArray->clean()->all();    
// []    

config

The config method allows you to set or retrieve local configuration.

$config = (new FluentArray())
    ->set('naming_strategy', new NullStrategy());
    
$fluentArray = (new FluentArray())
    ->config($config);
    
$fluentArray->config()->get('naming_strategy');
// instance of NullStrategy       

count

The count method returns the amount of values in the storage array.

$fluentArray = (new FluentArray())
    ->set('one', 1)
    ->set('two', 2)
    ->set('three', 3);

$fluentArray->count();
// 3

each

The each method iterates over the values in the storage array.

$odds = [];

$fluentArray = (new FluentArray())
    ->set('one', 1)
    ->set('two', 2)
    ->set('three', 3)
    ->set('four', 4);

$fluentArray->each(function ($value, $key) use (&$odds) {
    if ($value % 2 !== 0) {
        $odds[] = $value;
    }
});

$odds;
// [1, 3]

To stop the iteration return false from the callback.

$counter = 0;

$fluentArray = (new FluentArray())
    ->set('one', 1)
    ->set('two', 2)
    ->set('three', 3);

$fluentArray->each(function ($value, $key) use (&$counter) {
    if ($value > 1) {
        return false;
    }
    
    $counter++;
});

$counter;
// 1

filter

The filter method filters the storage array using the given callback. Return false from the callback to remove a value.

$sourceFluentArray = (new FluentArray())
    ->set('one', 1)
    ->set('two', 2);
    
$filteredFluentArray = $sourceFluentArray->filter(function ($value, $key) {
    return $value > 1;
});

$filteredFluentArray->all();
// ['two' => 2]    

If callback is not specified, all values, that can be converted to false will be removed.

$fluentArray = (new FluentArray())
    ->set('zero', 0)
    ->set('one', 1)
    ->set('two', 2);
    
$fluentArray->filter()->all();
// ['one' => 1, 'two' => 2]    

first

The first method retrieves the first value from the storage array.

$fluentArray = (new FluentArray())
    ->set('one', 1)
    ->set('two', 2);
    
$fluentArray->first();
// 1        

fromArray

The fromArray method converts an array to a fluent array.

$array = ['one' => 1, 'two' => 2];

$fluentArray = FluentArray::fromArray($array);

$fluentArray->all();
// ['one' => 1, 'two' => 2]

fromJson

The fromJson method converts JSON to a fluent array.

$json = '{"one":1,"two":2}';

$fluentArray = FluentArray::fromJson($json);

$fluentArray->all();
// ['one' => 1, 'two' => 2]

get

The get method retrieves the value from the storage array, that corresponds the given key.

$fluentArray = (new FluentArray())
    ->set('one', 1)
    ->set('two', 2);
    
$fluentArray->get('two');
// 2    

globalConfig

The globalConfig method allows you to set or retrieve global configuration.

$globalConfig = (new FluentArray())
    ->set('naming_strategy', new NullStrategy());
   
FluentArray::globalConfig($globalConfig);

FluentArray::globalConfig()->get('naming_strategy');
// instance of NullStrategy       

has

The has method checks if the given key exists in the storage array.

$fluentArray = (new FluentArray())
    ->set('one', 1)
    ->set('two', 2);
    
$fluentArray->has('one');
// true

$fluentArray->has('three');
// false    

keys

The keys method retrieves all the keys from the storage array.

$fluentArray = (new FluentArray())
    ->set('one', 1)
    ->set('two', 2);
    
$fluentArray->keys();
// ['one', 'two'] 

krsort

The krsort method sorts the storage array by keys in descending order. You can specify sort flags as a first argument.

$fluentArray = (new FluentArray())
    ->set('b', 1)
    ->set('a', 2)
    ->set('c', 3);
    
$fluentArray->krsort(SORT_STRING)->all();
// ['c' => 3, 'b' => 1, 'a' => 2] 

ksort

The ksort method sorts the storage array by keys in ascending order. You can specify sort flags as a first parameter.

$fluentArray = (new FluentArray())
    ->set('b', 1)
    ->set('a', 2)
    ->set('c', 3);
    
$fluentArray->ksort(SORT_STRING)->all();
// ['a' => 2, 'b' => 1, 'c' => 3] 

last

The last method retrieves the last value from the storage array.

$fluentArray = (new FluentArray())
    ->set('one', 1)
    ->set('two', 2);
    
$fluentArray->last();
// 2        

map

The map method applies the given callback to all values in the storage array and returns a new fluent array.

$sourceFluentArray = (new FluentArray())
    ->set('one', 1)
    ->set('two', 2);

$resultFluentArray = $sourceFluentArray->map(function ($value, $key) {
    return $value * 10;
});

$resultFluentArray->all();
// ['one' => 10, 'two' => 20]

pluck

The pluck method extracts values with the given key, from child fluent arrays to a new fluent array.

$fluentArray = (new FluentArray())
    ->set('one', (new FluentArray())->set('id', 1))
    ->set('two', (new FluentArray())->set('id', 2));
    
$fluentArray->pluck('id')->all();
// [1, 2]   

push

The push method appends the given value to the storage array.

$fluentArray = (new FluentArray())
    ->push(1)
    ->push(2);
    
$fluentArray->all();
// [1, 2]    

Another way of using the push method:

$fluentArray = (new FluentArray())
    ->push()
        ->one(1)
        ->two(2)
    ->end()
    ->push()
        ->three(3)
    ->end();
    
$fluentArray->toArray();
// [['one' => 1, 'two' => 2], ['three' => 3]]    

pushWhen

The pushWhen method appends the given value to the storage array, if the first argument is equivalent to true.

$fluentArray = (new FluentArray())
    ->pushWhen(true, 1)
    ->pushWhen(false, 2)
    ->pushWhen(function () { return true; }, 3);
    
$fluentArray->all();
// [1, 3]    

Another way of using the pushWhen method:

$fluentArray = (new FluentArray())
    ->pushWhen(true)
        ->one(1)
    ->end(false)
    ->pushWhen(false)
        ->two(2)
    ->end()
    ->pushWhen(function () { return true; })
        ->three(3)
    ->end();
    
$fluentArray->toArray();
// [['one' => 1], ['three' => 3]]    

rsort

The rsort method sorts the storage array in descending order. You can specify sort flags as a first parameter.

$fluentArray = (new FluentArray())
    ->set('three', 3)
    ->set('one', 1)
    ->set('two', 2);
    
$fluentArray->rsort(SORT_NUMERIC)->all();
// ['three' => 3, 'two' => 2, 'one' => 1]    

set

The set method sets the given key and value in the storage array.

$fluentArray = (new FluentArray())
    ->set('one', 1)
    ->set('two', 2);
    
$fluentArray->all();
// ['one' => 1, 'two' => 2]    

setWhen

The setWhen method sets the given key and value in the storage array, if the first argument is equivalent to true.

$fluentArray = (new FluentArray())
    ->setWhen(true, 'one', 1)
    ->setWhen(false, 'two', 2)
    ->setWhen(function () { return true; }, 'three', 3);
    
$fluentArray->all();
// ['one' => 1, 'three' => 3]    

sort

The sort method sorts the storage array in ascending order. You can specify sort flags as a first parameter.

$fluentArray = (new FluentArray())
    ->set('three', 3)
    ->set('one', 1)
    ->set('two', 2);
    
$fluentArray->sort(SORT_NUMERIC)->all();
// ['one' => 1, 'two' => 2, 'three' => 3]    

toArray

The toArray method converts a fluent array to an array.

$fluentArray = (new FluentArray())
    ->set('one', 1)
    ->set('two', 2);

$fluentArray->toArray();
// ['one' => 1, 'two' => 2]

toJson

The toJson method converts a fluent array to JSON.

$fluentArray = (new FluentArray())
    ->set('one', 1)
    ->set('two', 2);

$fluentArray->toJson();
// "{"one":1,"two":2}"

unset

The unset method removes the storage array value by the given key.

$fluentArray = (new FluentArray())
    ->set('one', 1)
    ->set('two', 2);
    
$fluentArray->unset('one')->all();
// ['two' => 2]    

usort

The usort method sorts the storage array using the given comparison function.

$fluentArray = (new FluentArray())
    ->set('three', 3)
    ->set('one', 1)
    ->set('two', 2);
    
$fluentArray->usort(function ($a, $b) {
    return $a <=> $b;
});    
    
$fluentArray->all();
// ['one' => 1, 'two' => 2, 'three' => 3]    

values

The values method retrieves all the values from the storage array.

$fluentArray = (new FluentArray())
    ->set('one', 1)
    ->set('two', 2);
    
$fluentArray->all();
// [1, 2]    

when

The when method executes the given callback, if the first argument is equivalent to true.

$fluentArray = new FluentArray();

$fluentArray->when(true, function () use ($fluentArray) {
    $fluentArray->set('one', 1);
});

$fluentArray->when(false, function () use ($fluentArray) {
    $fluentArray->set('two', 2);
});

$fluentArray->when(
    function () {
        return true;
    }, 
    function () use ($fluentArray) {
        $fluentArray->set('three', 3);
    }
);

$fluentArray->all();
// ['one' => 1, 'three' => 3]

You can specify a default callback, that will be executed, if the first argument is equivalent to false.

$fluentArray = new FluentArray();

$fluentArray->when(
    false, 
    function () use ($fluentArray) {
        $fluentArray->set('one', 1);
    },
    function () use ($fluentArray) {
        $fluentArray->set('two', 2);
    }
);

$fluentArray->all();
// ['two' => 2]

Dynamic methods

• Dynamic setter
• Dynamic getter
• Dynamic has
• Dynamic pluck
• Dynamic unset

Dynamic setter

You can also set a key-value pair in the storage array using a dynamic setter.

$fluentArray = (new FluentArray())
    ->one(1)
    ->two(2);
    
$fluentArray->all();
// ['one' => 1, 'two' => 2]    

If you want to set the key, that is reserved for a method name, you can escape it.

$fluentArray = (new FluentArray())
    ->{'\set'}(1)
    ->{'\get'}(2);
    
$fluentArray->all();
// ['set' => 1, 'get' => 2]    

Add When to set the given value if the first argument is equivalent to true.

$fluentArray = (new FluentArray())
    ->oneWhen(true, 1)
    ->twoWhen(false, 2)
    ->threeWhen(function () { return true; }, 3);
    
$fluentArray->all();
// ['one' => 1, 'three' => 3]    

You can also chain creation of child fluent arrays.

$fluentArray = (new FluentArray())
    ->one()
        ->two(3)
    ->end()
    ->three()
        ->four(4)
        ->five(5)
    ->end();
    
$fluentArray->toArray();
// ['one' => ['two' => 2], 'three' => ['four' => 4, 'five' => 5]]    

Dynamic getter

To retrieve a value from the storage array you can use a dynamic getter.

$fluentArray = (new FluentArray())
    ->one(1)
    ->two(2);
    
$fluentArray->two();
// 2    

Dynamic has

To check if a key exists in the storage array you can use a dynamic has method.

$fluentArray = (new FluentArray())
    ->one(1)
    ->two(2);
    
$fluentArray->hasOne();
// true

$fluentArray->hasThree();
// false    

Dynamic pluck

To extract values from child fluent arrays you can use a dynamic pluck method.

$fluentArray = (new FluentArray())
    ->one()
        ->id(1)
    ->end()
    ->two()
        ->id(2)
    ->end();
    
$fluentArray->pluckId()->all();
// [1, 2]   

Dynamic unset

To remove a value from the storage array you can use a dynamic unset method.

$fluentArray = (new FluentArray())
    ->one(1)
    ->two(2);
    
$fluentArray->unsetOne()->all();
// ['two' => 2]    

Implemented interfaces

• Countable
• Serializable
• ArrayAccess
• IteratorAggregate

Countable

The Countable interface provides the count method support. See more here.

$fluentArray = (new FluentArray())
    ->set('one', 1)
    ->set('two', 2);
    
count($fluentArray);
// 2

Serializable

The Serializable interface provides serialization support. See more here.

$fluentArray = (new FluentArray())
    ->set('one', 1)
    ->set('two', 2);
    
$serialized = serialize($fluentArray);
$unserialized = unserialize($serialized);

$unserialized->all();
// ['one' => 1, 'two' => 2]    

ArrayAccess

The ArrayAccess interface provides array access. See more here.

$fluentArray = new FluentArray();

$fluentArray['one'] = 1;
$fluentArray['two'] = 2;

$fluentArray['two'];
// 2

IteratorAggregate

The IteratorAggregate interface enables iteration over the storage array. See more here.

$fluentArray = (new FluentArray())
    ->set('one', 1)
    ->set('two', 2);
    
foreach ($fluentArray as $key => $value) {
    $fluentArray->set($key, $value * 10);
}    

$fluentArray->all();
// ['one' => 10, 'two' => 20]

Code formatting

If you use PhpStorm and code auto formatting, you will likely face the issue, that the following code:

$fluentArray = (new FluentArray())
    ->one()
        ->id(1)
    ->end()
    ->two()
        ->id(2)
    ->end();

Will be transformed by PhpStorm to:

$fluentArray = (new FluentArray())
    ->one()
    ->id(1)
    ->end()
    ->two()
    ->id(2)
    ->end();

Now the code is less readable, but luckily we can configure PhpStorm to disable auto formatting the specified peace of code. To do so, open PhpStorm preferences, go to the Editor > Code Style section and select option Enable formatter markers in comments.

Now you can turn the formatter off for the specific part of your code:

// @formatter:off
$fluentArray = (new FluentArray())
    ->one()
        ->id(1)
    ->end()
    ->two()
        ->id(2)
    ->end();
// @formatter:on