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Encoders
Encoders¶
Encoders basically turn arrays into formats and vice versa.
They implement
Symfony\Component\Serializer\Encoder\EncoderInterface for
encoding (array to format) and
Symfony\Component\Serializer\Encoder\DecoderInterface for
decoding (format to array).
You can add new encoders to a Serializer instance by using its second constructor argument:
use Symfony\Component\Serializer\Serializer;
use Symfony\Component\Serializer\Encoder\XmlEncoder;
use Symfony\Component\Serializer\Encoder\JsonEncoder;
$encoders = array(new XmlEncoder(), new JsonEncoder());
$serializer = new Serializer(array(), $encoders);
Built-in Encoders¶
Two encoders are used in the example above:
Symfony\Component\Serializer\Encoder\XmlEncoderto encode/decode XMLSymfony\Component\Serializer\Encoder\JsonEncoderto encode/decode JSON
The XmlEncoder¶
This encoder transforms arrays into XML and vice versa.
For example, take an object normalized as following:
array('foo' => array(1, 2), 'bar' => true);
The XmlEncoder will encode this object like that:
<?xml version="1.0"?>
<response>
<foo>1</foo>
<foo>2</foo>
<bar>1</bar>
</response>
Be aware that this encoder will consider keys beginning with @ as attributes:
$encoder = new XmlEncoder();
$encoder->encode(array('foo' => array('@bar' => 'value')));
// will return:
// <?xml version="1.0"?>
// <response>
// <foo bar="value" />
// </response>
The JsonEncoder¶
The JsonEncoder is much simpler and is based on the PHP
json_encode and json_decode functions.
This work, including the code samples, is licensed under a Creative Commons BY-SA 3.0 license.