PHP Bugs: #7281: rand() gives range warnings over 15 bits

Bug #7281	rand() gives range warnings over 15 bits
Submitted:	17 Oct 2000 11:26am UTC	Modified:	10 Nov 2000 2:54pm UTC
From:	a dot schommer at dialogmedien dot de	Assigned to:
Status:	Closed	Category:	Math related
Version:	4.0.2	OS:	Solaris 2.7

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[17 Oct 2000 11:26am UTC] a dot schommer at dialogmedien dot de

rand() should work on int, which is about 2 billion. But i get
Warning: rand(): Invalid range: 1000000..1032768 in
/tmp/apa2/htdocs/admin/tst.php3 on line 1

For this code:
<? print rand (1000000, 1032768); ?>
(a result is given anyway)

Not the size, but the difference seems to matter: If it exceeds 2^15-1,
the warning comes up:
<? print rand (1000000, 1032767); ?>
produces only a result

sizeof(int) really is 4.
So i don't think it's my fault.

[10 Nov 2000 2:54pm UTC] hholzgra@php.net

this is system dependant , on Solaris 2.7 you have

./stdlib.h:#define      RAND_MAX        32767

so that's it

you can always use the PHP function getrandmax() 
to find out the max. difference between the min and max
parameters for your system


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