PHP 8.6.0 RC3 released: not for production, next milestone 22 October

The PHP team announced on 8 October 2026 the release of the third release candidate for PHP 8.6.0 (RC3), a milestone in the development cycle described in the PHP Wiki. For those managing PHP hosting or control panels that offer multiple version selection, now is the time to begin compatibility testing on non-production environments, before the stable version arrives in repositories.

What's in the release

The PHP 8.6.0 RC3 source code is available on the official downloads page. The team explicitly invites you to test this version carefully and report any issues via the project's GitHub Issues. The message is clear: do not use this version in production, this is an early-stage test build.

For the complete list of new features and changes compared to previous versions, refer to the NEWS file included in the release archive. For those who need to plan updates to existing code, the UPGRADING file contains full migration notes, also available in the downloaded archive.

Verifying signatures and next steps

The cryptographic signatures for the release can be found in the manifest or on the pre-release builds page, useful for those who automate downloads and want to verify package integrity before installing it on staging environments.

The next milestone in the cycle is scheduled for 22 October 2026, when release candidate RC4 is expected.

What to do now

For those managing production servers, the recommendation remains standard for every RC cycle: test on isolated environments, verify compatibility of critical extensions and applications, and report regressions before the version is frozen for stable release. Those managing hosting control panels with multi-version PHP support should monitor the release of upcoming RCs to determine when to plan adding the new branch to environments offered to customers.

Source: official announcement from the PHP team, releases page on php.net (8 October 2026).