note 73429 added to function.rand

The example from "relsqui at armory dot com" is wrong. It talks about bit operations and uses "&", but is actually an example of using modulus and should use "%". The idea is that "rand()%(x+1)" is faster than "rand(0,x)". I agree, it is. But not a lot. Here's the fastest function I can think of for making pseudo-unique, valid IDs for HTML tags, in which the first character can't be a number: function makeID() { $s="abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890"; return $s{rand()%52}.$s{rand()%62}.(repeat ad libitum).$s{rand()%62}; } ---- Server IP: 82.103.133.188 Probable Submitter: 62.79.44.136 ---- Manual Page -- http://www.php.net/manual/en/function.rand.php Edit -- https://master.php.net/note/edit/73429 Del: integrated -- https://master.php.net/note/delete/73429/integrated Del: useless -- https://master.php.net/note/delete/73429/useless Del: bad code -- https://master.php.net/note/delete/73429/bad+code Del: spam -- https://master.php.net/note/delete/73429/spam Del: non-english -- https://master.php.net/note/delete/73429/non-english Del: in docs -- https://master.php.net/note/delete/73429/in+docs Del: other reasons-- https://master.php.net/note/delete/73429 Reject -- https://master.php.net/note/reject/73429 Search -- https://master.php.net/manage/user-notes.php