[PHP-NOTES] note 130247 added to function.apcu-delete

It seems apcu_delete returns an array of keys it failed to delete, when input is an array. The documentation is really confusing about this.
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Server IP: 45.112.84.4
Probable Submitter: 80.90.5.137 (proxied: 2001:7d0:87da:4c00:98b8:b75a:66c6:80ea)
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Manual Page -- https://php.net/manual/en/function.apcu-delete.php
Edit        -- https://main.php.net/note/edit/130247
Del: integrated  -- https://main.php.net/note/delete/130247/integrated
Del: useless     -- https://main.php.net/note/delete/130247/useless
Del: bad code    -- https://main.php.net/note/delete/130247/bad+code
Del: spam        -- https://main.php.net/note/delete/130247/spam
Del: non-english -- https://main.php.net/note/delete/130247/non-english
Del: in docs     -- https://main.php.net/note/delete/130247/in+docs
Del: other reasons-- https://main.php.net/note/delete/130247
Reject      -- https://main.php.net/note/reject/130247
Search      -- https://main.php.net/manage/user-notes.php