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GMP Functions
PHP Manual

# 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.

### Parameters

`limiter`

  The limiter. Defaults to 20.

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

### Return Values

A random GMP number.

### Examples

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";
?>`

The above example will output:

    1915834968
    8642564075890328087

gmp_prob_prime
gmp_scan0
GMP Functions
PHP Manual