---
title: "Breaking: #98032 - Serializable Interface fully removed"
manual: "TYPO3 Core Changelog"
version: "main"
permalink: "https://docs.typo3.org/permalink/changelog:breaking-98032"
source: "Changelog/12.0/Breaking-98032-SerializableInterfaceFullyRemoved.rst"
modified: "2026-09-14T09:47:36+00:00"
---

# Breaking: #98032 - Serializable Interface fully removed

See [forge#98032](https://forge.typo3.org/issues/98032)

## Description

The `Serializable` interface has been deprecated, and is
slated for removal entirely in PHP 9. The preferred
serialization tool is the `__serialize`/`__unserialize`
method pair.

All serializable classes in TYPO3 Core already implement
`__serialize`/`__unserialize`, which is automatically
used by PHP in place of `Serializable`. The now-vestigial
`Serializable` references have been removed.

## Impact

Generally none, unless a text string of an object serialized in TYPO3 v10
or earlier (using `Serializable`) is deserialized in TYPO3 v12, in
which case it will not deserialize correctly due to the different
string format used by `Serializable`. That is extremely unlikely
to happen.

The use of `Serializable` in extensions is not recommended anymore,
and will be removed from PHP in version 9.

## Affected Installations

None.

## Migration

None needed.