gmp_gcd

(PHP 4 >= 4.0.4, PHP 5, PHP 7)

gmp_gcd — Calculate GCD

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gmp_gcd ( GMP $a , GMP $b ) : GMP

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

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a

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b

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

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Example #1 gmp_gcd() example

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

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3

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