note 74177 added to function.key

I love the note of php at snr-graphics dot com. Really useful. Thanks! I thought it would be a good idea to remark some concepts and make it easier for someone to find this: relation associative arrays key index indexed recursion recursivity ---- Server IP: 130.206.1.5 Probable Submitter: 212.170.80.206 ---- Manual Page -- http://www.php.net/manual/en/function.key.php Edit -- https://master.php.net/note/edit/74177 Del: integrated -- https://master.php.net/note/delete/74177/integrated Del: useless -- https://master.php.net/note/delete/74177/useless Del: bad code -- https://master.php.net/note/delete/74177/bad+code Del: spam -- https://master.php.net/note/delete/74177/spam Del: non-english -- https://master.php.net/note/delete/74177/non-english Del: in docs -- https://master.php.net/note/delete/74177/in+docs Del: other reasons-- https://master.php.net/note/delete/74177 Reject -- https://master.php.net/note/reject/74177 Search -- https://master.php.net/manage/user-notes.php