note 53569 added to function.shuffle

note that in PHP 5.0.4 (and assumably earlier versions as well), shuffle internally calls rand(), not mt_rand(). This was important because I was trying to use a fixed seed to get repeatable results, by calling mt_srand(). But of course that doesn't work, since shuffle uses rand() not mt_rand(). The solution is either to use srand() for seeding, or to write your own version of shuffle() using mt_rand(). (See examples which others have contributed; or, just have a look at ext/standard/array.c) mt_rand on many platforms gives better results than the builtin library anyway... N.B. Obviously, the way the shuffle function is implemented may change without notice in future versions, including e.g. changing to use mt_rand instead. ---- Manual Page -- http://www.php.net/manual/en/function.shuffle.php Edit -- http://master.php.net/manage/user-notes.php?action=edit+53569 Delete: added to the manual -- http://master.php.net/manage/user-notes.php?action=delete+53569&report=yes&reason=added+to+the+manual Delete: bad code -- http://master.php.net/manage/user-notes.php?action=delete+53569&report=yes&reason=bad+code Delete: spam -- http://master.php.net/manage/user-notes.php?action=delete+53569&report=yes&reason=spam Delete: useless -- http://master.php.net/manage/user-notes.php?action=delete+53569&report=yes&reason=useless Delete: other reasons -- http://master.php.net/manage/user-notes.php?action=delete+53569&report=yes Reject -- http://master.php.net/manage/user-notes.php?action=reject+53569&report=yes Search -- http://master.php.net/manage/user-notes.php