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PHP Manual [gmp_gcd]

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PHP Manual || GMP Functions

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

gmp_gcdCalculate GCD

Description

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.

Parameters

a

Either a GMP number resource in PHP 5.5 and earlier, a GMP object in PHP 5.6 and later, or a numeric string provided that it is possible to convert the latter to a number.

b

Either a GMP number resource in PHP 5.5 and earlier, a GMP object in PHP 5.6 and later, or a numeric string provided 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

See Also



PHP Manual || GMP Functions