gmp_random_bits

(PHP 5 >= 5.6.3, PHP 7)

gmp_random_bitsRandom number

说明

GMP gmp_random_bits ( int $bits )

Generate a random number. The number will be between 0 and (2 ** bits) - 1.

bits must greater than 0, and the maximum value is restricted by available memory.

参数

bits

The number of bits.

可以是一个 GMP 数据 resouce,或一个可以转换为数值的字符串。

返回值

A random GMP number.

范例

Example #1 gmp_random_bits() example

<?php
$rand1 
gmp_random_bits(3); // random number from 0 to 7
$rand2 gmp_random_bits(5); // random number from 0 to 31

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

以上例程会输出:

3
15

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