note 52720 deleted from function.rand by felipe

Note Submitter: Gavin 

----

There is one problem with Luis and Goochivasquez's code.  substr starts at 0 not one, so the string is 0-39 not 1-40.  This means that substr would return false sometimes and would give you a length smaller than expected.

Here's a fix:

// RANDOM KEY PARAMETERS
$keychars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
$length = 40;

// RANDOM KEY GENERATOR
$randkey = "";
$max=strlen($keychars)-1;
for ($i=0;$i<$length;$i++) {
  $randkey .= substr($keychars, rand(0, $max), 1);
}