Registry Component

Controladores

Phalcon\Registry is an object oriented array. It extends Phalcon\Collection but cannot be extended itself since all of its methods are declared final. It offers speed, as well as implementations of various PHP interfaces. These are:

<?php

use Phalcon\Registry;

$data = [
    'colors' => [
        'red',
        'white',
        'blue',
    ],
    'year'   => 1776,
];

$collection = new Registry($data);

Constructor

Puede construir el objeto como cualquier otro objeto en PHP. Sin embargo, el constructor acepta un parámetro opcional array, que rellenará el objeto por usted.

<?php

use Phalcon\Registry;

$data = [
    'colors' => [
        'red',
        'white',
        'blue',
    ],
    'year'   => 1776,
];

$collection = new Registry($data);

Reusing

También puede reutilizar el componente, volviéndolo a rellenar. Phalcon\Registry exposes the clear() and init() methods, which will clear and repopulate the internal array respectively,

<?php

use Phalcon\Registry;

$data = [
    'colors' => [
        'red',
        'white',
        'blue',
    ],
    'year'   => 1776,
];

$collection = new Registry($data);

echo $collection->count(); // 2

$data = [
    'year' => 1776,
];

$collection->clear();

$collection->init($data);

echo $collection->count(); // 1

Get

As mentioned above, Phalcon\Registry implements several interfaces, in order to make the component as flexible as possible. Retrieving data stored in an element can be done by using:

Property
__get()
array based get ($collection[$element])
offsetGet()
get()

The fastest way is by using the property syntax:

<?php

use Phalcon\Registry;

$data = [
    'colors' => [
        'red',
        'white',
        'blue',
    ],
    'year'   => 1776,
];

$collection = new Registry($data);

echo $collection->year; // 1776

You can use __get($element) but it is not advisable as it is much slower than the property syntax. The same applies to offsetGet

echo $collection->__get('year');           // 1776
echo $collection['year'];                  // 1776
echo $collection->offsetGet('year');       // 1776
echo $collection->get('year', 1776, true); // 1776

public function get(
    string $element, 
    mixed $defaultValue = null, 
    string $cast = null
):  mixed

Using get() offers three extra parameters. When $defaultValue is defined in the call and the element is not found, $defaultValue will be returned. The cast parameter accepts a string that defines what the returned value will be casted. The available values are:

array
bool
boolean
double
float
int
integer
null
object
string

Has

To check whether an element exists or not in the collection, you can use the following:

isset() on the property
__isset()
array based isset (isset($collection[$element]))
offsetExists()
has()

The fastest way is by using the property syntax:

<?php

use Phalcon\Registry;

$data = [
    'colors' => [
        'red',
        'white',
        'blue',
    ],
    'year'   => 1776,
];

$collection = new Registry($data);

echo isset($collection->year); // true

You can use __isset(element) but it is not advisable as it is much slower than the property syntax. The same applies to offsetExists

echo $collection->__isset('year');        // true
echo isset($collection['year']);          // true
echo $collection->offsetExists('year');   // true
echo $collection->has('year', true);      // true

public function has(string $element):  bool

Set

To set an element in the collection, you can use the following:

assign the value to the property
__set()
array based assignment
offsetSet()
set()

The fastest way is by using the property syntax:

<?php

use Phalcon\Registry;

$data = [
    'colors' => [
        'red',
        'white',
        'blue',
    ],
];

$collection = new Registry($data);

$collection->year = 1776;

You can use __set($element, $value) but it is not advisable as it is much slower than the property syntax. The same applies to offsetSet

$collection->__set('year', 1776);
$collection['year'] = 1776;
$collection->offsetSet('year', 1776);
$collection->set('year', 1776); 

Remove

To remove an element in the collection, you can use the following:

unset the property
__unset()
array based unset
offsetUnset()
remove()

The fastest way is by using the property syntax:

<?php

use Phalcon\Registry;

$data = [
    'colors' => [
        'red',
        'white',
        'blue',
    ],
];

$collection = new Registry($data);

unset($collection->year);

You can use __unset($element) but it is not advisable as it is much slower than the property syntax. The same applies to offsetUnset

$collection->__unset('year');
unset($collection['year']);
$collection->offsetUnset('year');
$collection->remove('year'); 

public function remove(string $element):  void

Iteration

Dado que el objeto de colección implementa \IteratorAggregate, puedes iterar con facilidad a través del objeto. El método getIterator() devuelve un objeto ArrayIterator()

<?php

use Phalcon\Registry;

$data = [
    'colors' => [
        'red',
        'white',
        'blue',
    ],
    'year'   => 1776,
];

$collection = new Registry($data);

foreach ($collection as $key => $value) {
    echo $key . ' - ' . $value . PHP_EOL;
}

Count

La implementación de la interfaz \Countable expone el método count(), que almacena el número de elementos en la colección.

<?php

use Phalcon\Registry;

$data = [
    'colors' => [
        'red',
        'white',
        'blue',
    ],
    'year'   => 1776,
];

$collection = new Registry($data);

echo $collection->count(); // 2

Serialization

The \Serializable and \JsonSerializable interfaces expose methods that allow you to serialize and unserialize the object. serialize() and unserialize() use PHP’s serialize and unserialize functions. jsonSerialize() returns an array which can be used with json_encode to serialize the object.

<?php

use Phalcon\Registry;

$data = [
    'colors' => [
        'red',
        'white',
        'blue',
    ],
    'year'   => 1776,
];

$collection = new Registry($data);

echo $collection->serialize();    // a:2:{s:6:"colors";a:3:{i:0;s:3:"red";i:1;s:5:"white";i:2;s:4:"blue";}s:4:"year";i:1776;}

$serialized = 'a:2:{s:6:"colors";a:3:{i:0;s:3:"red";i:1;s:5:"white";i:2;s:4:"blue";}s:4:"year";i:1776;}';
$collection->unserialize($serialized);

echo $collection->jsonSerialize(); // $data

Transformations

Phalcon\Registry also exposes two transformation methods: toArray() and toJson(int $options). toArray() returns the object transformed as an array. This method returns the same array as jsonSerialize().

<?php

use Phalcon\Registry;

$data = [
    'colors' => [
        'red',
        'white',
        'blue',
    ],
    'year'   => 1776,
];

$collection = new Registry($data);

echo $collection->toArray(); // $data

toJson(int $options) returns a JSON representation of the object. It uses json_encode internally and accepts a parameter, which represents the flags that json_encode accepts. By default the options are set up with the value 74, (RFC4327) which translates to:

JSON_HEX_TAG
JSON_HEX_APOS
JSON_HEX_AMP
JSON_HEX_QUOT
JSON_UNESCAPED_SLASHES

You can pass any valid flags to the method according to your needs.

<?php

use Phalcon\Registry;

$data = [
    'colors' => [
        'red',
        'white',
        'blue',
    ],
    'year'   => 1776,
];

$collection = new Registry($data);

echo $collection->toJson(); // ["red","white","blue"],"year":1776}

echo $collection->toJson(74 + JSON_PRETTY_PRINT);
/**
{
    "colors": [
        "red",
        "white",
        "blue"
    ],
    "year": 1776
}
*/