PHP5中文手册·Random number -- 追寻梦想＞编程乐园＞PHP 编程

说明

resource gmp_random ( int $limiter )

Generate a random number. The number will be between zero and 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 16 or 32, but this is not guaranteed.

参数

limiter

The limiter.

It can be either a GMP number resource, or a numeric string given that it is possible to convert the latter to a number.

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";
?>

上例将输出：

1915834968
8642564075890328087


	PHP5中文手册 gmp_prob_prime gmp_scan0 GMP PHP Manual gmp_random (PHP 4 >= 4.0.4, PHP 5) gmp_random — Random number 说明 resource gmp_random ( int `$limiter` ) Generate a random number. The number will be between zero and 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 16 or 32, but this is not guaranteed. 参数 `limiter` The limiter. It can be either a GMP number resource, or a numeric string given that it is possible to convert the latter to a number. 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"; ?>` 上例将输出： 1915834968 8642564075890328087 gmp_prob_prime gmp_scan0 GMP PHP Manual