Php/docs/function.gmp-random

• PHP Manual
• GMP 函数
• Random number

gmp_random

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

gmp_random — Random number

Warning 本函数已自 PHP 7.2.0 起废弃。强烈建议不要使用本函数。

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.

PHP 5.5 之前为 GMP 数值资源，PHP 5.6 之后为 GMP 对象或数字，或可以转为数字的字符串。

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

以上例程会输出：

1915834968
8642564075890328087