ErrorException: Warning: Undefined array key "host"

[jhobden600]

Occasionally I see in the logs the $original['host'] value is undefined on line 716 in wp-includes/canonical.php. I'm not sure if it's bots, or a local script triggering this error, but it seems to be possible on occasion for the array key 'host' to be missing.

Either way, there should be a check that the value of $original['host'] isset, before proceeding. I suggest

if (!isset($original['host'])){
    $original['host'] = '';
}

is added on line 715 in wp-includes/canonical.php to prevent the warning.

PHP version 8.3.6. Using latest WordPress version 6.6.2.

[jhobden600]

I created a PR here: ​https://github.com/jameshobden/wordpress-develop/pull/1/commits/5af4ae6e3b497993e3dbe579f040c57f91b908d6

[ironprogrammer]

Welcome to Trac, @jhobden600, and thanks for the report!

This issue is being tracked over in #34353, where you are invited to help move this forward.