PHP | gmp_random_seed() Function

PHP | gmp_random_bits() Function

Last Updated : 08 Jun, 2018

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

// 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:

Program 2 :

php

<?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:

Reference:http://php.net/manual/en/function.gmp-random-bits.php

PHP | gmp_random_seed() Function

P

priya_1998

Improve

Article Tags :

Practice Tags :

Misc

Similar Reads

PHP | gmp_random() Function

The gmp_random() function is an inbuilt function in PHP which generates a random number. The range of random number will be in between zero and the number of bits per limb ( A limb is an internal GMP mechanism. The number of bits in a limb is not static and it can vary from system to system. Usually

PHP | random_bytes () Function

The random_bytes()is an inbuilt function in PHP. The main function is to generate cryptographically secure pseudo-random bytes. It generates cryptographic random bytes of arbitrary string length. The different sources of randomness used in this function, they are as follows:- Window : CryptGenRandom

PHP | gmp_random_seed() Function

The gmp_random_seed() is an inbuilt function in PHP which sets the RNG seed( Random Number Generation). Syntax: void gmp_random_seed ( mixed $seed ) Parameters: The gmp_random_seed() function accepts a single parameter as mentioned above and explained below: $seed: It is the only parameter required

PHP | gmp_random_range() Function

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 accept

PHP | gmp_div_r() Function

The gmp_div_r() function is an in-built function in PHP which performs the division operation between two GMP numbers (GNU Multiple Precision : For large numbers) and returns the remainder. Syntax : gmp_div_r($num1, $num2) Parameters : This function accepts two GMP numbers, $num1 and $num2 as mandat

PHP mt_rand( ) Function

While working with algorithms we often come across situations when we need to generate random integers. The most common way to generate random numbers is using Mersenne Twister. The Mersenne Twister is a pseudorandom number generator which got its name derived from the fact that its period length is

PHP | gmp_clrbit() Function

The gmp_clrbit() function is an in-built function in PHP which clears a bit of a GMP number (GNU Multiple Precision). The gmp_clrbit() function sets the bit at a specified index in a GMP number to 0. The index starts at zero from the least significant bit. Syntax : gmp_clrbit( $num, $index ) Paramet

PHP | random_int() Function

The random_int () is an inbuilt function in PHP. The main function is to generate cryptographically secure pseudo-random integers value. When unbiased results occur in critical condition, then generated cryptographic random integers are used.The different sources of randomness used in this function

PHP | gmp_powm() Function

The gmp_powm() is an inbuilt function in PHP which is used to calculate the number raised to a power of two GMP numbers modulo of another GMP number.(GNU Multiple Precision: For large numbers)Syntax: gmp_pow( $base, $exp, $mod) Parameters: The function accepts three mandatory parameters $base, $exp

PHP | gmp_root() Function

The gmp_root() is an in-built function in PHP which returns the integer part of the N-th root of a GMP number(GNU Multiple Precision: For large numbers).Syntax:Â Â gmp_root( $num, $n ) Parameters: The function accepts two mandatory parameters $num and $n.Â Â $num - This is the GMP number whose integer