gmp_random()

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

Random number

Warning

This function has beenDEPRECATEDas of PHP 7.2.0. Relying on this functionis highly discouraged.

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$limiter. If$limiteris 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.

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

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

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.