How to Create your Custom Encoder
The Serializer Component uses Normalizers to transform any data to an array. Then, by leveraging Encoders, that data can be converted into any data-structure (e.g. JSON).
The Component provides several built-in encoders that are described in the serializer component but you may want to use another structure that's not supported.
Creating a new encoder
Imagine you want to serialize and deserialize YAML. For that you'll have to create your own encoder that uses the Yaml Component:
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// src/Serializer/YamlEncoder.php
namespace App\Serializer;
use Symfony\Component\Serializer\Encoder\DecoderInterface;
use Symfony\Component\Serializer\Encoder\EncoderInterface;
use Symfony\Component\Yaml\Yaml;
class YamlEncoder implements EncoderInterface, DecoderInterface
{
public function encode($data, string $format, array $context = []): string
{
return Yaml::dump($data);
}
public function supportsEncoding(string $format, array $context = []): bool
{
return 'yaml' === $format;
}
public function decode(string $data, string $format, array $context = []): array
{
return Yaml::parse($data);
}
public function supportsDecoding(string $format, array $context = []): bool
{
return 'yaml' === $format;
}
}Registering it in your app
If you use the Symfony Framework, then you probably want to register this encoder as a service in your app. If you're using the default services.yaml configuration, that's done automatically!
Tip
If you're not using autoconfigure, make sure
to register your class as a service and tag it with serializer.encoder.
Now you'll be able to serialize and deserialize YAML!