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<?php |
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|
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namespace Stripe\Util; |
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|
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/** |
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* A basic random generator. This is in a separate class so we the generator |
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* can be injected as a dependency and replaced with a mock in tests. |
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*/ |
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class RandomGenerator |
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{ |
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/** |
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* Returns a random value between 0 and $max. |
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* |
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* @param float $max (optional) |
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* |
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* @return float |
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*/ |
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public function randFloat($max = 1.0) |
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{ |
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return \mt_rand() / \mt_getrandmax() * $max; |
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} |
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|
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/** |
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* Returns a v4 UUID. |
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* |
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* @return string |
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*/ |
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public function uuid() |
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{ |
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$arr = \array_values(\unpack('N1a/n4b/N1c', \openssl_random_pseudo_bytes(16))); |
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$arr[2] = ($arr[2] & 0x0FFF) | 0x4000; |
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$arr[3] = ($arr[3] & 0x3FFF) | 0x8000; |
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|
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return \vsprintf('%08x-%04x-%04x-%04x-%04x%08x', $arr); |
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} |
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} |
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