Random\Engine\Xoshiro256StarStar::__construct

(PHP 8 >= 8.2.0)

Random\Engine\Xoshiro256StarStar::__construct — Constructs a new xoshiro256** engine

说明

public Random\Engine\Xoshiro256StarStar::__construct(string|int|null $seed = null)

警告

本函数还未编写文档，仅有参数列表。

参数

seed

How the internal 256 bit (32 byte) state consisting of four unsigned 64 bit integers is seeded depends on the type used as the seed.

Type 说明
null Fills the state with 32 random bytes generated using the CSPRNG.
int Fills the state with four consecutive values generated with the SplitMix64 algorithm that was seeded with seed interpreted as an unsigned 64 bit integer.
string Fills the state by interpreting a 32 byte string as four little-endian unsigned 64 bit integers.

错误／异常

  • If the length of a string seed is not 32 bytes, a ValueError will be thrown.
  • If a string seed consists of 32 NUL bytes ("\x00"), a ValueError will be thrown.

范例

示例 #1 Random\Engine\Xoshiro256StarStar::__construct() example

<?php

/* ... */

?>

以上例程的输出类似于：

...