note 125313 added to function.array-key-exists

While Nik Tang's remark about the performance increase when using isset() first for PHP <= 7.3 is true, it is no longer valid for 7.4 and 8.0. array_key_exists() is now as fast as isset() and the use of both is now slower for cases where the key is zero or actually does not exist. ---- Server IP: 45.112.84.4 Probable Submitter: 103.51.167.36 (proxied: 2003:d3:f22:b100:d08c:7f4c:7d33:89f3) ---- Manual Page -- http://php.net/manual/en/function.array-key-exists.php Edit -- https://master.php.net/note/edit/125313 Del: integrated -- https://master.php.net/note/delete/125313/integrated Del: useless -- https://master.php.net/note/delete/125313/useless Del: bad code -- https://master.php.net/note/delete/125313/bad+code Del: spam -- https://master.php.net/note/delete/125313/spam Del: non-english -- https://master.php.net/note/delete/125313/non-english Del: in docs -- https://master.php.net/note/delete/125313/in+docs Del: other reasons-- https://master.php.net/note/delete/125313 Reject -- https://master.php.net/note/reject/125313 Search -- https://master.php.net/manage/user-notes.php