In Symfony 6, I we will promote usage of configuration written in PHP instead of YAML. For third-party bundles and core, we should do the same, replacing XML with PHP. Doing so would remove the need for the XML lib for core.

The biggest advantage is auto-completion with any modern IDE without explicit support for Symfony, and probably one less thing to learn (how to configure things in YAML/XML).

Be warned that semantic configuration will stay in YAML for now (as using PHP is much harder there).

#36778 did the work for the Twig bundle as an example.

We now need help from the community to move all the other bundles:

PLEASE, comment here BEFORE starting to work on something and WAIT for the confirmation to avoid duplicate work.

• src/Symfony/Bundle/DebugBundle/Resources/config/services.xml (@jschaedl)
• src/Symfony/Bundle/FrameworkBundle/Resources/config/annotations.xml (@magnetik)
• src/Symfony/Bundle/FrameworkBundle/Resources/config/assets.xml (@NguyenTruongLinh)
• src/Symfony/Bundle/FrameworkBundle/Resources/config/cache*.xml (@iamvar)
• src/Symfony/Bundle/FrameworkBundle/Resources/config/collectors.xml (@hvt)
• src/Symfony/Bundle/FrameworkBundle/Resources/config/console.xml (@AhmedRaafat14)
• src/Symfony/Bundle/FrameworkBundle/Resources/config/debug*.xml (@TuxBoy)
• src/Symfony/Bundle/FrameworkBundle/Resources/config/error_renderer.xml (@benji07)
• src/Symfony/Bundle/FrameworkBundle/Resources/config/esi.xml (@tuanminhgp)
• src/Symfony/Bundle/FrameworkBundle/Resources/config/form*.xml (@misekai)
• src/Symfony/Bundle/FrameworkBundle/Resources/config/fragment*.xml (@idetox)
• src/Symfony/Bundle/FrameworkBundle/Resources/config/http*.xml (@IonBazan)
• src/Symfony/Bundle/FrameworkBundle/Resources/config/identity_translator.xml (@smmd)
• src/Symfony/Bundle/FrameworkBundle/Resources/config/lock.xml (@tomasjav)
• src/Symfony/Bundle/FrameworkBundle/Resources/config/mailer*.xml (@instabledesign)
• src/Symfony/Bundle/FrameworkBundle/Resources/config/messenger*.xml (@hyoa)
• src/Symfony/Bundle/FrameworkBundle/Resources/config/mime_type.xml (@GromNaN)
• src/Symfony/Bundle/FrameworkBundle/Resources/config/notifier*.xml (@szepczynski)
• src/Symfony/Bundle/FrameworkBundle/Resources/config/profiling.xml (@hvt)
• src/Symfony/Bundle/FrameworkBundle/Resources/config/property_access.xml (@qneyrat)
• src/Symfony/Bundle/FrameworkBundle/Resources/config/property_info.xml (@qneyrat)
• src/Symfony/Bundle/FrameworkBundle/Resources/config/request.xml (@dangkhoagms)
• src/Symfony/Bundle/FrameworkBundle/Resources/config/routing*.xml (@phamuyentri)
• src/Symfony/Bundle/FrameworkBundle/Resources/config/secrets.xml (@GromNaN)
• src/Symfony/Bundle/FrameworkBundle/Resources/config/security_csrf.xml (@noweh)
• src/Symfony/Bundle/FrameworkBundle/Resources/config/serializer.xml (@mamontovdmitriy)
• src/Symfony/Bundle/FrameworkBundle/Resources/config/services.xml (@rvanlaak)
• src/Symfony/Bundle/FrameworkBundle/Resources/config/session.xml (@cocorambo)
• src/Symfony/Bundle/FrameworkBundle/Resources/config/ssi.xml (@50bhan)
• src/Symfony/Bundle/FrameworkBundle/Resources/config/test.xml (@GaryPEGEOT)
• src/Symfony/Bundle/FrameworkBundle/Resources/config/translation*.xml (@malteschlueter)
• src/Symfony/Bundle/FrameworkBundle/Resources/config/validator*.xml (@simivar)
• src/Symfony/Bundle/FrameworkBundle/Resources/config/web*.xml (@ck-developer)
• src/Symfony/Bundle/FrameworkBundle/Resources/config/workflow.xml (@lyrixx)
• src/Symfony/Bundle/SecurityBundle/Resources/config/collectors.xml (@JudicaelR)
• src/Symfony/Bundle/SecurityBundle/Resources/config/console.xml (@JudicaelR)
• src/Symfony/Bundle/SecurityBundle/Resources/config/guard.xml (@JudicaelR)
• src/Symfony/Bundle/SecurityBundle/Resources/config/security*.xml (@qneyrat)
• src/Symfony/Bundle/SecurityBundle/Resources/config/templating_twig.xml (@ck-developer)
• src/Symfony/Bundle/WebProfilerBundle/Resources/config/*.xml (@jschaedl)