---
title: PHP-SDK - 4.0.3
slug: feature-experimentation/release-notes/php-sdk-4-0-3
docTags: 
createdAt: 2026-07-20T15:44:40.388Z
---

## What's Changed

- \[FSSDK-12316] \[Security] Fix curl|bash vulnerability in SourceClear scan by @Tamara-Barum in [https://github.com/optimizely/php-sdk/pull/294](https://github.com/optimizely/php-sdk/pull/294)
- \[FSSDK-12610] Fix: PHP 8.4 implicit nullable parameter deprecation warnings by @Tamara-Barum in [https://github.com/optimizely/php-sdk/pull/296](https://github.com/optimizely/php-sdk/pull/296)
- \[FSSDK-12610] chore: Prepare release 4.0.3 by @Tamara-Barum in [https://github.com/optimizely/php-sdk/pull/297](https://github.com/optimizely/php-sdk/pull/297)

## New Contributors

- @Tamara-Barum made their first contribution in [https://github.com/optimizely/php-sdk/pull/294](https://github.com/optimizely/php-sdk/pull/294)

**Full Changelog**: [https://github.com/optimizely/php-sdk/compare/4.0.2...4.0.3](https://github.com/optimizely/php-sdk/compare/4.0.2...4.0.3)

[https://github.com/optimizely/php-sdk/releases/tag/4.0.3](https://github.com/optimizely/php-sdk/releases/tag/4.0.3)