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Calculate GCD


gmp_gcd

(PHP 4 >= 4.0.4, PHP 5)

gmp_gcdCalculate GCD

Description

resource gmp_gcd ( resource $a , resource $b )

Calculate greatest common divisor of a and b. The result is always positive even if either of, or both, input operands are negative.

Parameters

a

It can be either a GMP number resource, or a numeric string given that it is possible to convert the latter to a number.

b

It can be either a GMP number resource, or a numeric string given that it is possible to convert the latter to a number.

Return Values

A positive GMP number that divides into both a and b.

Examples

Example #1 gmp_gcd() example

<?php
$gcd 
gmp_gcd("12""21");
echo 
gmp_strval($gcd) . "\n";
?>

The above example will output:

 3 



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