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[Serializer] Add Support for Encoding Arrays as Child <item> Elements in XML Encoder#60228

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Deltachaos wants to merge1 commit intosymfony:7.4
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@DeltachaosDeltachaos commentedApr 16, 2025•
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QA
Branch?7.3
Bug fix?no
New feature?yes
Deprecations?no
Issues
LicenseMIT

Feature: Add Support for Encoding Arrays as Child<item> Elements in XML Encoder

This PR introduces a new option to the Symfony Serializer'sXmlEncoder that allows indexed arrays to be encoded as<item> elements under a single parent element, rather than repeating the parent element for each array item.

Motivation

Currently, encoding an array like:

['person' => [    ['firstname' =>'Benjamin','lastname' =>'Alexandre'],    ['firstname' =>'Damien','lastname' =>'Clay'],]]

produces the following XML:

<response>    <person>        <firstname>Benjamin</firstname>        <lastname>Alexandre</lastname>    </person>    <person>        <firstname>Damien</firstname>        <lastname>Clay</lastname>    </person></response>

This structure is not ideal when a clear container-child relationship is required, such as when interoperating with systems that expect such XML structures.

New Behavior

With the newXmlEncoder::ARRAY_AS_ITEM option enabled, the same data now encodes to:

<response>    <person>        <itemkey="0">            <firstname>Benjamin</firstname>            <lastname>Alexandre</lastname>        </item>        <itemkey="1">            <firstname>Damien</firstname>            <lastname>Clay</lastname>        </item>    </person></response>

Usage

$xml =$encoder->encode($data,'xml', [    XmlEncoder::ARRAY_AS_ITEM =>true,]);

@fabpotfabpot modified the milestones:7.3,7.4May 26, 2025
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