The gmp_random_range() is an inbuilt function in PHP which generates a random number.The random number thus generated lies between range min to max. Here GMP refers to (GNU Multiple Precision) which is for large numbers.
Syntax:
gmp_random_range ( GMP $min, GMP $max )
Parameters: The function accepts two parameters, GMP $min number representing lower bound for the random number and GMP $max number to represent the upper bound of the random number. This parameter can be a GMP object in PHP version 5.6 and later, or we are also allowed to pass a numeric string provided that it is possible to convert that string to a number.
Return Value: The function returns a random GMP number in the range $min-$max.
Examples:
Input : lower bound=0, upper bound =100 Output : 25 Input : lower bound=-100, upper bound=-10 Output : -23 Note:Output will vary every time on execution
Below programs illustrate the use of gmp_random_range() function:
Program 1: The program below demonstrates the working of gmp_random_range() function when numeric strings are passed as arguments.
<?php // PHP program to demonstrate the gmp_random_range() function   // numeric string as arguments $min = "-200"; $max = "-100";     $rand = gmp_random_range($min, $max);   echo $rand; ?> |
Output:
-165
Program 2: The program below demonstrates the working of gmp_random_range() when GMP number is passed as an argument.
<?php // PHP program to demonstrate the gmp_random_range() function   // GMP numbers as arguments $min = gmp_init("1000", 2); $max = gmp_init("1000000", 2);     $rand = gmp_random_range($min, $max);   // gmp_strval converts GMP number to string // representation in given base(default 10). echo gmp_strval($rand) . "\n"; ?> |
Output:
30
Reference:
http://php.net/manual/en/function.gmp-random-range.php
