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gmp_gcd
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gmp_gcd

(PHP 4 >= 4.0.4, PHP 5)

gmp_gcd -- Calculate 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.

Example 1. gmp_gcd() example

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

The printout of the above program will be: 

3
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