(PHP 7)
random_int — Generates cryptographically secure pseudo-random integers
$min
, int $max
)Generates cryptographic random integers that are suitable for use where unbiased results are critical, such as when shuffling a deck of cards for a poker game.
The sources of randomness used for this function are as follows:
Note: Although this function was added to PHP in PHP 7.0, a » userland implementation is available for PHP 5.2 to 5.6, inclusive.
min
The lowest value to be returned, which must be
PHP_INT_MIN
or higher.
max
The highest value to be returned, which must be less than or equal to
PHP_INT_MAX
.
Returns a cryptographically secure random integer in the range
min
to max
, inclusive.
max
is less than min
, an
Error will be thrown.
Example #1 random_int() example
<?php
var_dump(random_int(100, 999));
var_dump(random_int(-1000, 0));
?>
以上例程的输出类似于:
int(248) int(-898)