[PHP-NOTES] note 130453 added to language.types.singleton

May be null could be considered to be a singleton type two. In my possibly wrong understanding, PHP has three singleton types, not just two.
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Server IP: 45.112.84.4
Probable Submitter: 80.90.5.137 (proxied: 89.159.109.113)
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Manual Page -- https://php.net/manual/en/language.types.singleton.php
Edit        -- https://main.php.net/note/edit/130453
Del: integrated  -- https://main.php.net/note/delete/130453/integrated
Del: useless     -- https://main.php.net/note/delete/130453/useless
Del: bad code    -- https://main.php.net/note/delete/130453/bad+code
Del: spam        -- https://main.php.net/note/delete/130453/spam
Del: non-english -- https://main.php.net/note/delete/130453/non-english
Del: in docs     -- https://main.php.net/note/delete/130453/in+docs
Del: other reasons-- https://main.php.net/note/delete/130453
Reject      -- https://main.php.net/note/reject/130453
Search      -- https://main.php.net/manage/user-notes.php