(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:
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.
  
Example #1 random_int() example
<?php
var_dump(random_int(100, 999));
var_dump(random_int(-1000, 0));
?>
The above example will output something similar to:
int(248) int(-898)