(PHP 4 >= 4.0.4, PHP 5, PHP 7)
gmp_com — Calculates one's complement
gmp_com ( GMP|int|string $num ) : GMP
Returns the one's complement of num.
num
A GMP object, an int or a numeric string.
Returns the one's complement of num, 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://www.php.net/manual/en/function.gmp-com.php