gmp_random

(PHP 4 >= 4.0.4, PHP 5, PHP 7)

gmp_randomRandom number

Warning

本函数已自 PHP 7.2.0 起被废弃,并自 PHP 8.0.0 起被移除。 强烈建议不要依赖本函数。

说明

gmp_random ( int $limiter = 20 ) : GMP

Generate a random number. The number will be between 0 and (2 ** n) - 1, where n is the number of bits per limb multiplied by limiter. If limiter is negative, negative numbers are generated.

A limb is an internal GMP mechanism. The number of bits in a limb is not static, and can vary from system to system. Generally, the number of bits in a limb is either 32 or 64, but this is not guaranteed.

参数

limiter

The limiter.

GMP 对象或 int ,或数字string

返回值

A random GMP number.

范例

Example #1 gmp_random() example

<?php
$rand1 
gmp_random(1); // random number from 0 to 1 * bits per limb
$rand2 gmp_random(2); // random number from 0 to 2 * bits per limb

echo gmp_strval($rand1) . "\n";
echo 
gmp_strval($rand2) . "\n";
?>

以上例程会输出:

1915834968
8642564075890328087

User Contributed Notes

asphp at dsgml dot com 27-Mar-2016 03:48
Warning: Do not use this function.

Use gmp_random_bits() or gmp_random_range() instead.

The documentation and the code for this function do NOT match, and in any case this function is quite useless.