note 125279 added to function.key-exists

key_exists() is an alias of array_key_exists() so you use it in the exact same way: Example: $test_array = [1, 7, 0, 2, 2, 0, 1, 1]; $test_1 = key_exists(4, $test_array); $test_2 = array_key_exists(4, $test_array); $test_3 = key_exists(2, $test_array); $test_4 = array_key_exists(2, $test_array); echo($test_1, $test_2, $test_3 $test_4); Result: false false true true Pretty self-explanatory :) ---- Server IP: 45.112.84.4 Probable Submitter: 103.51.166.36 (proxied: 164.160.144.2) ---- Manual Page -- http://php.net/manual/en/function.key-exists.php Edit -- https://master.php.net/note/edit/125279 Del: integrated -- https://master.php.net/note/delete/125279/integrated Del: useless -- https://master.php.net/note/delete/125279/useless Del: bad code -- https://master.php.net/note/delete/125279/bad+code Del: spam -- https://master.php.net/note/delete/125279/spam Del: non-english -- https://master.php.net/note/delete/125279/non-english Del: in docs -- https://master.php.net/note/delete/125279/in+docs Del: other reasons-- https://master.php.net/note/delete/125279 Reject -- https://master.php.net/note/reject/125279 Search -- https://master.php.net/manage/user-notes.php