PHP code example of crell / serde

    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

    

crell / serde example snippets

use Crell\Serde\SerdeCommon;

$serde = new SerdeCommon();

$object = new SomeClass();
// Populate $object somehow;

$jsonString = $serde->serialize($object, format: 'json');

$deserializedObject = $serde->deserialize($jsonString, from: 'json', to: SomeClass::class);

use Crell\Serde\Attributes as Serde;

#[Serde\ClassSettings(
    protected string $name = 'Larry';
}

use Crell\Serde\Attributes\Field;

class Person
{
    #[Field(serializedName: 'callme')]
    protected string $name = 'Larry';
}

use Crell\Serde\Attributes\Field;
use Crell\Serde\Renaming\Cases;

class Person
{
    #[Field(renameWith: Cases::snake_case)]
    public string $firstName = 'Larry';

    #[Field(renameWith: Cases::CamelCase)]
    public string $lastName = 'Garfield';
}

use Crell\Serde\Attributes\Field;
use Crell\Serde\Renaming\Prefix;

class MailConfig
{
    #[Field(renameWith: new Prefix('mail_')]
    protected string $host = 'smtp.example.com';

    #[Field(renameWith: new Prefix('mail_')]
    protected int $port = 25;

    #[Field(renameWith: new Prefix('mail_')]
    protected string $user = 'me';

    #[Field(renameWith: new Prefix('mail_')]
    protected string $password = 'sssh';
}

use Crell\Serde\Attributes\Field;

class Person
{
    #[Field(alias: ['layout', 'design'])]
    protected string $format = '';
}

use Crell\Serde\Attributes\Field;

class Person
{
    #[Field(default: 'Hidden')]
    public string $location;

    #[Field(useDefault: false)]
    public int $age;

    public function __construct(
        public string $name = 'Anonymous',
    ) {}
}

use Crell\Serde\Attributes as Serde;

class Results
{
    public function __construct(
        #[Serde\Field(flatten: true)]
        public Pagination $pagination,
        #[Serde\SequenceField(arrayType: Product::class)]
        public array $products,
    ) {}
}

class Pagination
{
    public function __construct(
        public int $total,
        public int $offset,
        public int $limit,
    ) {}
}

class Product
{
    public function __construct(
        public string $name,
        public float $price,
    ) {}
}

use Crell\Serde\Attributes as Serde;

class DetailedResults
{
    public function __construct(
        #[Serde\Field(flatten: true)]
        public NestedPagination $pagination,
        #[Serde\Field(flatten: true)]
        public ProductType $type,
        #[Serde\SequenceField(arrayType: Product::class)]
        public array $products,
        #[Serde\Field(flatten: true)]
        public array $other = [],
    ) {}
}

class NestedPagination
{
    public function __construct(
        public int $total,
        public int $limit,
        #[Serde\Field(flatten: true)]
        public PaginationState $state,
    ) {}
}

class PaginationState
{
    public function __construct(
        public int $offset,
    ) {
    }
}

class ProductType
{
    public function __construct(
        public string $name = '',
        public string $category = '',
    ) {}
}

class Person
{
    public function __construct(
        public string $name,
        #[Field(flatten: true)]
        public Age $age,
        #[Field(flatten: true)]
        public Email $email,
    ) {}
}

readonly class Email
{
    public function __construct(
        #[Field(serializedName: 'email')] public string $value,
    ) {}
}

readonly class Age
{
    public function __construct(
        #[Field(serializedName: 'age')] public int $value
    ) {
        $this->validate();
    }

    #[PostLoad]
    private function validate(): void
    {
        if ($this->value < 0) {
            throw new \InvalidArgumentException('Age cannot be negative.');
        }
    }
}

readonly class JobDescription
{
    public function __construct(
        #[Field(flatten: true, flattenPrefix: 'min_')]
        public Age $minAge,
        #[Field(flatten: true, flattenPrefix: 'max_')]
        public Age $maxAge,
    ) {}
}

class JobEntry
{
    public function __construct(
        #[Field(flatten: true, flattenPrefix: 'desc_')]
        public JobDescription $description,
    ) {}
}

use Crell\Serde\Attributes\SequenceField;

class Order
{
    public string $orderId;

    public int $userId;

    #[SequenceField(arrayType: Product::class)]
    public array $products;
}

use Crell\Serde\Attributes\SequenceField;

class Order
{
    #[SequenceField(implodeOn: ',')]
    protected array $productIds = [5, 6, 7];
}

use Crell\Serde\Attributes\DictionaryField;

class Settings
{
    #[DictionaryField(implodeOn: ',', joinOn: '=')]
    protected array $dimensions = [
        'height' => 40,
        'width' => 20,
    ];
}

use Crell\Serde\Attributes\DateField;

class Settings
{
    #[DateField(format: 'Y-m-d')]
    protected DateTimeImmutable $date = new DateTimeImmutable('4 July 2022-07-04 14:22);
}

namespace Crell\Serde\Records;

use Crell\Serde\Attributes\SequenceField;

class CsvTable
{
    public function __construct(
        #[SequenceField(arrayType: CsvRow::class)]
        public array $people,
    ) {}
}

class CsvRow
{
    public function __construct(
        public string $name,
        public int $age,
        public float $balance,
    ) {}
}

// The JsonStreamFormatter and CsvStreamFormatter are not ()]);

// You may use any PHP supported stream here, including files, network sockets,
// stdout, an in-memory temp stream, etc.
$init = FormatterStream::new(fopen('/tmp/output.json', 'wb'));

$result = $serde->serialize($data, format: 'json-stream', init: $init);

// $result is a FormatterStream object that wraps the same handle as before.
// What you can now do with the stream depends on what kind of stream it is.

use Crell\Serde\Attributes\SequenceField;

class ProductList
{
    public function __construct(
        #[SequenceField(arrayType: Product::class)]
        private iterable $products,
    ) {}
}

class Product
{
    public function __construct(
        public readonly string $name,
        public readonly string $color,
        public readonly float $price,
    ) {}
}

$databaseConn = ...;

$callback = function() use ($databaseConn) {
    $result = $databaseConn->query("SELECT name, color, price FROM products ORDER BY name");

    // Assuming $record is an associative array.
    foreach ($result as $record) {
        yield new Product(...$record);
    }
};

// This is a lazy list of products, which will be pulled from the database.
$products = new ProductList($callback());

// Use the CSV formatter this time, but JsonStream works just as well.
$s = new SerdeCommon(formatters: [new CsvStreamFormatter()]);

// Write to stdout, aka, back to the browser.
$init = FormatterStream::new(fopen('php://output', 'wb'));

$result = $serde->serialize($products, format: 'csv-stream', init: $init);

use Crell\Serde\Attributes\SequenceField;

interface Product {}

interface Book extends Product {}

class PaperBook implements Book
{
    protected string $title;
    protected int $pages;
}

class DigitalBook implements Book
{
    protected string $title;
    protected int $bytes;
}

class Sale
{
    protected Book $book;

    protected float $discountRate;
}

class Order
{
    protected string $orderId;

    #[SequenceField(arrayType: Book::class)]
    protected array $products;
}

use Crell\Serde\ClassNameTypeMap;

class Sale
{
    #[ClassNameTypeMap(key: 'type')]
    protected Book $book;

    protected float $discountRate;
}

use Crell\Serde\Attributes\StaticTypeMap;

class Sale
{
    #[StaticTypeMap(key: 'type', map: [
        'paper' => Book::class,
        'ebook' => DigitalBook::class,
    ])]
    protected Book $book;

    protected float $discountRate;
}

use Crell\Serde\Attributes as Serde;

class Order
{
    protected string $orderId;

    #[Serde\SequenceField(arrayType: Book::class)]
    #[Serde\StaticTypeMap(key: 'type', map: [
        'paper' => Book::class,
        'ebook' => DigitalBook::class,
    ])]
    protected array $books;
}

use Crell\Serde\Attributes\StaticTypeMap;

#[StaticTypeMap(key: 'type', map: [
    'paper' => Book::class,
    'ebook' => DigitalBook::class,
])]
interface Book {}

use Crell\Serde\Attributes\StaticTypeMap;

#[StaticTypeMap(key: 'type', map: [
    'paper' => Book::class,
    'ebook' => DigitalBook::class,
    'toy' => Gadget::class,
])]
interface Product {}

use Crell\Serde\TypeMap;

class ProductTypeMap implements TypeMap
{
    public function __construct(protected readonly Connection $db) {}

    public function keyField(): string
    {
        return 'type';
    }

    public function findClass(string $id): ?string
    {
        return $this->db->someLookup($id);
    }

    public function findIdentifier(string $class): ?string
    {
        return $this->db->someMappingLogic($class);
    }
}

$typeMap = new ProductTypeMap($dbConnection);

$serde = new SerdeCommon(typeMaps: [
    Your\App\Product::class => $typeMap,
]);

$json = $serde->serialize($aBook, to: 'json');

class User
{
    private string $username;

    #[Field(exclude: true)]
    private string $password;

    #[Field(exclude: true)]
    #[Field(scope: 'admin')]
    private string $role;
}

$json = $serde->serialize($user, 'json');

$json = $serde->serialize($user, 'json', scopes: ['admin']);

#[ClassSettings(
    #[Field]
    private int $id = 5;

    #[Field]
    #[Field(scopes: ['legacy'], serializedName: 'label')]
    private string $name = 'Fancy widget';

    #[Field(scopes: ['newsystem'])]
    private float $price = '9.99';

    #[Field(scopes: ['legacy'], serializedName: 'cost')]
    private float $legacyPrice = 9.99;

    #[Field(serializedName: 'desc')]
    private string $description = 'A fancy widget';

    private int $stock = 50;
}

$json = $serde->serialize($product, 'json', scopes: ['legacy', 'newsystem']);