PHP 8.5: `setAccessible` deprecations

[swissspidy]

Parent ticket for all things PHP 8.5: #63061

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ReflectionProperty::setAccessible() and similar are deprecated since 8.5, as they have no effect since 8.1. See ​https://wiki.php.net/rfc/deprecations_php_8_5#deprecate_reflectionsetaccessible

The solution is to call these functions only conditionally (e.g. if (\PHP_VERSION_ID < 80100) { $reflection->setAccessible(true); })

There are quite a few instances in core tests that we need to fix. See ​https://github.com/search?q=repo%3AWordPress%2Fwordpress-develop+setAccessible+language%3APHP&type=code&l=PHP

[rishabhwp]

I’d be happy to work on this and will submit a PR soon.

[swissspidy]

In 60729:

Code Modernization: Address reflection no-op function deprecations in PHP 8.5.

Reflection*::setAccessible() methods are no-ops since PHP 8.1. This commit adds conditional checks to only call these functions on older PHP versions.

Reference: ​PHP RFC: Deprecations for PHP 8.5: Deprecate `Reflection*::setAccessible()`.

Props rishabhwp, swissspidy.
Fixes #63956.
See #63061.

[swissspidy]

In 60731:

Code Modernization: Fix setAccessible() PHP version comparison in two instances.

Follow-up to [60729].

See #63956.

[swissspidy]

In 60903:

Privacy: Wrap Reflection*::setAccessible() call in conditional check.

These methods are no-ops since PHP 8.1 and deprecated since PHP 8.5.

Reference: ​PHP RFC: Deprecations for PHP 8.5: Deprecate `Reflection*::setAccessible()`.

See #63956, #44267.