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<?php
namespace Stripe\Util;
/**
* A basic random generator. This is in a separate class so we the generator
* can be injected as a dependency and replaced with a mock in tests.
*/
class RandomGenerator
{
/**
* Returns a random value between 0 and $max.
*
* @param float $max (optional)
* @return float
*/
public function randFloat($max = 1.0)
{
return mt_rand() / mt_getrandmax() * $max;
}
/**
* Returns a v4 UUID.
*
* @return string
*/
public function uuid()
{
$arr = array_values(unpack('N1a/n4b/N1c', openssl_random_pseudo_bytes(16)));
$arr[2] = ($arr[2] & 0x0fff) | 0x4000;
$arr[3] = ($arr[3] & 0x3fff) | 0x8000;
return vsprintf('%08x-%04x-%04x-%04x-%04x%08x', $arr);
}
}