note 21052 modified in function.srand by cece

From: Date: Tue, 30 Mar 2004 14:12:47 +0000
Subject: note 21052 modified in function.srand by cece
References: 1  Groups: php.notes 
Request: Send a blank email to php-notes+get-67382@lists.php.net to get a copy of this message
[Editor's note: 1234567 is NOT a prime number] I created an application that requires millions of different random values replicating dice and have found over substantial time, the numbers even up towards the middle. May I suggest rather than this: (double)microtime()*1000000 Use this instead: (double)microtime()*1234567 1000000 is an even number, divisible by almost anything. 1234567 is a prime number and is hence uneven so it gives a little more flexibility with range. Don't know if this change was the main reason for affecting the application, but it seemed to help. --was-- I created an application that requires millions of different random values replicating dice and have found over substantial time, the numbers even up towards the middle. May I suggest rather than this: (double)microtime()*1000000 Use this instead: (double)microtime()*1234567 1000000 is an even number, divisible by almost anything. 1234567 is a prime number and is hence uneven so it gives a little more flexibility with range. Don't know if this change was the main reason for affecting the application, but it seemed to help. http://www.php.net/manual/en/function.srand.php

« previous php.notes (#67382) next »