(PHP 5 >= 5.6.3, PHP 7, PHP 8)
gmp_random_range — Get a uniformly selected integer
Generate a random number. The number will be between
min and max.
min and max can both be negative,
but min must always be less than max.
本函数并不会生成安全加密的值，并且不可用于加密或者要求返回值不可猜测的目的。
如果需要加密安全随机，则可以将 Random\Engine\Secure 引擎用于 Random\Randomizer。对于简单的用例，random_int() 和 random_bytes() 函数提供了操作系统的 CSPRNG 支持的方便且安全的 API。
minA GMP number representing the lower bound for the random number
maxA GMP number representing the upper bound for the random number
Returns a GMP object which contains
a uniformly selected integer from the closed interval
[min, max]. Both
min and max are
possible return values.
If max is less than min,
a ValueError will be thrown.
示例 #1 gmp_random_range() example
<?php
$rand1 = gmp_random_range(0, 100); // random number between 0 and 100
$rand2 = gmp_random_range(-100, -10); // random number between -100 and -10
echo gmp_strval($rand1) . "\n";
echo gmp_strval($rand2) . "\n";
?>以上示例会输出：
42 -67