Php/docs/function.gmp-random-bits

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gmp_random_bits

(PHP 5 >= 5.6.3, PHP 7)

gmp_random_bits — Random number

说明

gmp_random_bits ( int $bits ) : GMP

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.

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 31echo gmp_strval($rand1) . "\n";echo gmp_strval($rand2) . "\n";?>

以上例程会输出：

3
15