gmp_com

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

gmp_com — Calculates one's complement

GMP gmp_com ( GMP $a )

Returns the one's complement of a.

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.

Returns the one's complement of a, as a GMP number.

Example #1 gmp_com() example

<?php
$com = gmp_com("1234");
echo gmp_strval($com) . "\n";
?>

The above example will output:

-1235

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https://secure.php.net/manual/en/function.gmp-com.php