Deprecated: Return type of Requests_Cookie_Jar when activating PHP 8.1

[oldrup]

If updating from PHP 8.0 to PHP 8.1, different variants of the following two errors are thrown when selecting "View details" in the plugins list.

Deprecated: Return type of Requests_Cookie_Jar::offsetUnset($key) should either be compatible with ArrayAccess::offsetUnset(mixed $offset): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /serverurl/wp-includes/Requests/Cookie/Jar.php on line 102

Deprecated: Return type of Requests_Cookie_Jar::getIterator() should either be compatible with IteratorAggregate::getIterator(): Traversable, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /serverurl/wp-includes/Requests/Cookie/Jar.php on line 111

• WordPress 6.1.1.
• All plugins disabled.
• Tested with Twenty Sixteen and Blocksy theme.
• No errors when downgrading to PHP 8.0.

Please let me know if I can supply more details to help to get rid of these errors :)

[swissspidy]

Thanks for your report!

This is a known issue that has already been fixed in #54504 for WordPress 6.2 due out in March.

[oldrup]

Beautiful. I *did* try to read that ticket, but I wasn't confident it applied. :)

Thank you for your patience ;)