note 76222 added to function.array-key-exists

Regarding performance differences between isset() and array_key_exists(), the differences may be there, but the function are not always interchangable. Note that when $a[1] = null then isset($a[1]) == false but array_key_exists(1, $a) == true ---- Server IP: 208.69.120.35 Probable Submitter: 66.212.193.19 ---- Manual Page -- http://www.php.net/manual/en/function.array-key-exists.php Edit -- https://master.php.net/note/edit/76222 Del: integrated -- https://master.php.net/note/delete/76222/integrated Del: useless -- https://master.php.net/note/delete/76222/useless Del: bad code -- https://master.php.net/note/delete/76222/bad+code Del: spam -- https://master.php.net/note/delete/76222/spam Del: non-english -- https://master.php.net/note/delete/76222/non-english Del: in docs -- https://master.php.net/note/delete/76222/in+docs Del: other reasons-- https://master.php.net/note/delete/76222 Reject -- https://master.php.net/note/reject/76222 Search -- https://master.php.net/manage/user-notes.php