gmp_invert

Inverse by modulo (PHP 4 >= 4.0.4, PHP 5)
resource gmp_invert ( resource a, resource b )

Computes the inverse of a modulo b. Returns FALSE if an inverse does not exist.

例 678. gmp_invert() example

<?php
echo gmp_invert("5", "10"); // no inverse, outputs nothing, result is FALSE
$invert = gmp_invert("5", "11");
echo
gmp_strval($invert) . "\n";
?>

The printout of the above program will be:

9