PHP Compatibility and WordPress Versions

WordPress aims to support new versions of PHP on the day they are released as much as possible. As a project, the process of supporting these new versions begins after each new PHP version has hit feature freeze and are tagging beta versions. This prevents having to revert or make additional changes to WordPress if a planned feature is removed or the implementation changes.

Past changes to supported PHP versions have been as followed:

In WordPress version 4.1: Added support for PHP 5.6.
In WordPress 4.4: Added support for PHP 7.0 (dev note).
In WordPress 4.7: Added support for PHP 7.1.
In WordPress 4.9: Added support for PHP 7.2.
In WordPress 5.0: Added support for PHP 7.3 (dev note).
In WordPress 5.2: Dropped support for PHP 5.2, 5.3, 5.4, 5.5.
In WordPress 5.3: Added support for PHP 7.4 (dev note).
In WordPress 5.6: Added “beta support” for PHP 8.0 (dev note).
In WordPress 5.9: Added “beta support” for PHP 8.1 (dev note).
In WordPress 6.1: Added “beta support” for PHP 8.2.
December 1, 2022: Security team dropped support for WordPress 3.7-4.0 (announcement post).
In WordPress 6.3:
- Dropped support for PHP 5.6.
- Raised PHP 8.0 to compatible with exceptions.
  - Exceptions:
    - Named parameters. WordPress does not support named parameters.
    - Filesystem WP_Filesystem_FTPext and WP_Filesystem_SSH2 when connect fails.
- Raised PHP 8.1 to compatible with exceptions.
  - Exceptions:
In WordPress 6.4: Added “beta support” for PHP 8.3 (news post).
In WordPress 6.6:
- Dropped support for PHP 7.0 & 7.1.
- Raised PHP 8.2 to compatible with exceptions.
  - Exceptions:
    - PHP 8.0 and 8.1 exceptions.
In WordPress 6.7: Added “beta support” for PHP 8.4.

For more details : https://make.wordpress.org/core/handbook/references/php-compatibility-and-wordpress-versions/

PHP Compatibility and WordPress Versions

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