note 118917 added to function.array-merge

I constantly forget the direction of array_merge so this is partially for me and partially for people like me. array_merge is a non-referential non-inplace right-reduction. For different ctrl-f typers, it's reduce-right, side-effect free, idempotent, and non in-place. ex: $a = array_merge(['k' => 'a'], ['k' => 'b']) => ['k' => 'b'] array_merge(['z' => 1], $a) => does not modify $a but returns ['k' => 'b', 'z' => 1]; Hopefully this helps people that constant look this up such as myself. ---- Server IP: 72.52.91.14 Probable Submitter: 104.174.111.223 ---- Manual Page -- http://php.net/manual/en/function.array-merge.php Edit -- https://master.php.net/note/edit/118917 Del: integrated -- https://master.php.net/note/delete/118917/integrated Del: useless -- https://master.php.net/note/delete/118917/useless Del: bad code -- https://master.php.net/note/delete/118917/bad+code Del: spam -- https://master.php.net/note/delete/118917/spam Del: non-english -- https://master.php.net/note/delete/118917/non-english Del: in docs -- https://master.php.net/note/delete/118917/in+docs Del: other reasons-- https://master.php.net/note/delete/118917 Reject -- https://master.php.net/note/reject/118917 Search -- https://master.php.net/manage/user-notes.php