vendor/stripe/stripe-php/lib/Util/RandomGenerator.php

   1 <?php
   2
   3 namespace Stripe\Util;
   4
   5 /**
   6  * A basic random generator. This is in a separate class so we the generator
   7  * can be injected as a dependency and replaced with a mock in tests.
   8  */
   9 class RandomGenerator
  10 {
  11     /**
  12      * Returns a random value between 0 and $max.
  13      *
  14      * @param float $max (optional)
  15      * @return float
  16      */
  17     public function randFloat($max = 1.0)
  18     {
  19         return mt_rand() / mt_getrandmax() * $max;
  20     }
  21
  22     /**
  23      * Returns a v4 UUID.
  24      *
  25      * @return string
  26      */
  27     public function uuid()
  28     {
  29         $arr = array_values(unpack('N1a/n4b/N1c', openssl_random_pseudo_bytes(16)));
  30         $arr[2] = ($arr[2] & 0x0fff) | 0x4000;
  31         $arr[3] = ($arr[3] & 0x3fff) | 0x8000;
  32         return vsprintf('%08x-%04x-%04x-%04x-%04x%08x', $arr);
  33     }
  34 }