note 125416 added to function.rand

Note that the algorithm change in version 7.1.0 broke the repeatability of a random sequence initialized with a given value. For example if you have a program like: <?php srand($argv[1]); for ($i = 0; $i < 10; $i++) { echo rand().PHP_EOL; } ?> It will will no longer produce the same results after version 7.1.0. This can be very important for some kinds of simulations. Hopefully you were using mt_rand() or something better all along, otherwise you will have some digging to do if you want your program to be able to repeat simulations from the pre-7.1.0 days... You will need to look in the PHP source archives to discover the algorithm they used to use and replicate it in your program. ---- Server IP: 45.112.84.4 Probable Submitter: 185.85.3.172 (proxied: 192.86.3.5) ---- Manual Page -- http://php.net/manual/en/function.rand.php Edit -- https://master.php.net/note/edit/125416 Del: integrated -- https://master.php.net/note/delete/125416/integrated Del: useless -- https://master.php.net/note/delete/125416/useless Del: bad code -- https://master.php.net/note/delete/125416/bad+code Del: spam -- https://master.php.net/note/delete/125416/spam Del: non-english -- https://master.php.net/note/delete/125416/non-english Del: in docs -- https://master.php.net/note/delete/125416/in+docs Del: other reasons-- https://master.php.net/note/delete/125416 Reject -- https://master.php.net/note/reject/125416 Search -- https://master.php.net/manage/user-notes.php