(PHP 4, PHP 5, PHP 7, PHP 8)
mt_getrandmax — Show largest possible random value
Returns the maximum value that can be returned by a call to mt_rand().
This function has no parameters.
   Returns the maximum random value returned by a call to
   mt_rand() without arguments, which is the maximum value
   that can be used for its max parameter without the
   result being scaled up (and therefore less random).