generating random numbers-please help!

[Anon]

this post basically consists of 2 questions. hope you can help me!
1)is there any way to specify the number of digits of a random number generated and how?
2)i currently use the following method to generate random numbers:
mt_srand((double)microtime()*1000000);
$randomnum = mt_rand();
is this the best way or is there better?

thanks!!

[Anon]

mt_rand() allows you to specify a a minumum, and a maximum value.. So if you want 3 digits returned, you could use:

$randomnum = mt_rand(100,999);

for 4 digits:

$randomnum = mt_rand(1000,9999);

ect, ect. You can use variables for the value to allow you to change the value via the script if you need to.