The following object is used to compute numbers with a gaussian distribution

link http://us.php.net/manual/en/function.rand.php#53784
package classes

 Methods

Gets a random number in a gaussian distribution

gauss() 

Get an ms value

gauss_ms(double $m, double $s) 

Parameters

$m

double

$s

double

Gets a random float between 0 and 1

random_0_1()