#25639 [NoF->Csd]: problem with rand()

ID: 25639 Updated by: sniper@php.net Reported By: adamm at nycap dot rr dot com -Status: No Feedback +Status: Closed Bug Type: Scripting Engine problem Operating System: windows PHP Version: 4.3.3 New Comment: This bug has been fixed in CVS. In case this was a PHP problem, snapshots of the sources are packaged every three hours; this change will be in the next snapshot. You can grab the snapshot at http://snaps.php.net/. In case this was a documentation problem, the fix will show up soon at http://www.php.net/manual/. In case this was a PHP.net website problem, the change will show up on the PHP.net site and on the mirror sites in short time. Thank you for the report, and for helping us make PHP better. Previous Comments: ------------------------------------------------------------------------ [2003-10-08 09:30:00] paul dot vaughan at weston dot ac dot uk I was having this problem (PHP 4.3.3 on WinNT 4) but in response to iliaa@php.net's question, the function 'srand()' does indeed fix the problem. The code: for ($j=1; $j<10001; $j++) { print (rand(0, $j)."<br>"); } ...produced the same ten thousand random numbers each and every time. Putting srand() before the loop stopped this happening. I hope this info is useful to someone; not sure anyone will read this...! Vaughany. ------------------------------------------------------------------------ [2003-09-29 05:55:49] sniper@php.net No feedback was provided. The bug is being suspended because we assume that you are no longer experiencing the problem. If this is not the case and you are able to provide the information that was requested earlier, please do so and change the status of the bug back to "Open". Thank you. ------------------------------------------------------------------------ [2003-09-23 22:29:00] iliaa@php.net Does this happen if you call srand() prior to calling the rand() function? ------------------------------------------------------------------------ [2003-09-23 18:37:38] adamm at nycap dot rr dot com I downgraded to 4.3.2 and I dont have this problem. I also found several posts on the net about many people on Win XP having this problem with 4.3.3. Definate bug id say. ------------------------------------------------------------------------ [2003-09-23 18:21:40] adamm at nycap dot rr dot com Description: ------------ I am developing on a newly setup Windows XP Box running PHP 4.3.3 on IIS as CGI. The rand() function is not generating random numbers. Even with a min/max declared it will only once generate a number in that range... and than any other time called (even across browser sessions) it will always and forever generate the same number. The code below is broken down to the smallest example possible. Reproduce code: --------------- <?php echo rand(); ?> Expected result: ---------------- I expect to see a random number. Actual result: -------------- The same number is always displayed. ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=25639&edit=1