Encoders
Encoders¶
Encoders basically turn arrays into formats and vice versa.
They implement
EncoderInterface for
encoding (array to format) and
DecoderInterface for
decoding (format to array).
You can add new encoders to a Serializer instance by using its second constructor argument:
1 2 3 4 5 6 | 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);
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Built-in Encoders¶
Two encoders are used in the example above:
XmlEncoderto encode/decode XMLJsonEncoderto 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:
1 2 3 4 5 6 | <?xml version="1.0"?>
<response>
<foo>1</foo>
<foo>2</foo>
<bar>1</bar>
</response>
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Be aware that this encoder will consider keys beginning with @ as attributes:
1 2 3 4 5 6 7 | $encoder = new XmlEncoder();
$encoder->encode(array('foo' => array('@bar' => 'value')));
// will return:
// <?xml version="1.0"?>
// <response>
// <foo bar="value" />
// </response>
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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.