Sergey Biryukov 6e9c29da06 Bootstrap/Load: Avoid a PHP warning when setting the $pagenow global in wp-includes/vars.php. ...

In some scenarios where `is_admin()` returns true but `$_SERVER['PHP_SELF']` does not match a `wp-admin/*` location, setting the `$pagenow` global could trigger a PHP warning: `Undefined array key 1`.

This commit avoids the warning by checking whether the matches array is not empty.

Props janh2, konradyoast, peterwilsoncc.
Fixes #54700.
Built from https://develop.svn.wordpress.org/trunk@53294


git-svn-id: http://core.svn.wordpress.org/trunk@52883 1a063a9b-81f0-0310-95a4-ce76da25c4cd

2022-04-27 13:47:11 +00:00

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