gmp_gcd

Calculate GCD (PHP 4 >= 4.0.4, PHP 5)
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.

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.

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

<?php

$gcd = gmp_gcd("12", "21");

echo gmp_strval($gcd) . "\n";

?>

The above example will output:

3

<< gmp_fact	Main : Function Reference : GMP Functions : gmp_gcd	gmp_gcdext >>
Javascript debugger Website design