Explicitly globalize some missing query globals in wp-settings.php

[nbachiyski]

When WordPress is loaded in a function (e.g. unit tests) the variables initialized at the top level aren't globals, but we expect them to be.

For example, if in a unit test there is no way to access $wp_query, either directly or via get_query_var() before some other part of the code has initialized it.

This happens especially when we are testing a plugin and it uses $wp_query in its initialization routine.

[nacin]

Looks good.

[nbachiyski]

In 26996:

Explicitly globalize some missing query globals in wp-settings.php

When WordPress is loaded in a function (e.g. unit tests) the variables initialized at the top level aren't globals, but we expect them to be.

Fixes #26867

[xknown]

The $wp->init() call in line 334 (wp-settings.php) should be transformed to $GLOBALS['wp']->init(). Otherwise unit tests that don't call global $wp; on their config file fail with a PHP fatal error due to the fact that $wp isn't defined.

[nbachiyski]

In 26997:

Excplitcly globalized call to $wp later in wp-settings.php

Props xknown, fixes #26867.