note 117866 added to language.types.null

I can't understand how unset() function can't remove the variables (assign them null instead). If we create a new var e.g $low and want to echo it we'll get null. When we assign a 5 value to the $low var and next unset this variable, we'll get null too as above. ---- Server IP: 92.48.119.85 Probable Submitter: 217.173.198.237 ---- Manual Page -- http://php.net/manual/en/language.types.null.php Edit -- https://master.php.net/note/edit/117866 Del: integrated -- https://master.php.net/note/delete/117866/integrated Del: useless -- https://master.php.net/note/delete/117866/useless Del: bad code -- https://master.php.net/note/delete/117866/bad+code Del: spam -- https://master.php.net/note/delete/117866/spam Del: non-english -- https://master.php.net/note/delete/117866/non-english Del: in docs -- https://master.php.net/note/delete/117866/in+docs Del: other reasons-- https://master.php.net/note/delete/117866 Reject -- https://master.php.net/note/reject/117866 Search -- https://master.php.net/manage/user-notes.php