The gmp_random_bits() function is an inbuilt function in PHP which generates a random number. The random number will thus be between the range 0 and (2 * bits) – 1. Here bits must be greater than 0, and the maximum value of bits is restricted by available memory. Here GMP refers (GNU Multiple Precision) which is for large numbers.
Syntax :
GMP gmp_random_bits ( int $bits )
Parameters : The above function accepts a single parameter as mentioned above and described below :
- $bits : IT accepts only one parameter This parameter can be a GMP number resource in PHP 5.5 and earlier, a GMP object in PHP 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.
Examples:
Input : bits = 3 Output : 3 Input : bits = 5 Output : 15 Note: Output will vary every time on execution
Program 1 :
<?php // PHP program to demonstrate // the gmp_random_bits() function // random number within 0 to 15 $rand = gmp_random_bits(4); echo gmp_strval($rand) . "\n"; ?> |
Output:
10
Program 2 :
<?php // PHP program to demonstrate // the gmp_random_bits() function // random number within 0 to 31 $rand = gmp_random_bits(5); // gmp_strval converts GMP number to string // representation in given base(default 10). echo gmp_strval($rand) . "\n"; ?> |
Output:
15
Reference:http://php.net/manual/en/function.gmp-random-bits.php
