PHP | gmp_mod() Function

The gmp_mod() is an inbuilt function in PHP which is used to find the modulo of a GMP number(GNU Multiple Precision: For large numbers) with another GMP number $d where the sign of $d is neglected. 

Syntax: 

gmp_mod ( $num, $d )

Parameters: The function accepts two GMP numbers $num and $d as mandatory parameters as shown in the above syntax. These parameters can be a GMP object in PHP version 5.6 and later, or we are also allowed to pass multiple numeric strings provided that it is possible to convert that string to a number.

Return Value: The function returns a GMP number which is equivalent to ($num % $d). 

Examples:

Input : $num="8" $d="3" 
Output :  2

Input : $num="10" $d="4"
Output :  2

Below programs illustrate the gmp_mod() function: 

Program 1: The program below demonstrates the working of gmp_mod() function when numeric string are passed as arguments. 

php

<?php
// PHP program to demonstrate the gmp_mod() function

// arguments as numeric strings
$mod = gmp_mod("8", "3");

// prints the calculated modulus
echo gmp_strval($mod) . "\n";
?>

Output:

2

Program 2: The program below demonstrates the working of gmp_mod() when GMP number are passed as arguments. 

php

<?php
// PHP program to demonstrate the gmp_mod function

// arguments as GMP numbers

$num = gmp_init("1010", 2); // num = 10
$d = gmp_init("100", 2);  // d = 4

$mod = gmp_mod($num, $d);

// prints the calculated modulus
// gmp_strval converts GMP number to string
// representation in given base(default 10).
echo gmp_strval($mod) . "\n";
?>

Output:

2

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