PHP. Учебник. 2005

gmp_random

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gmp_random

(PHP 4 >= 4.0.4, PHP 5)gmp_random -- Random number

Description

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.

Пример 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";
?>

- The printout of the above program might be: 
1915834968

8642564075890328087

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gmp_prob_prime

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