Php/docs/function.gmp-gcd
From Get docs
gmp_gcd
(PHP 4 >= 4.0.4, PHP 5, PHP 7)
gmp_gcd — Calculate GCD
Description
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