(PHP 4 >= 4.0.4, PHP 5)
gmp_invert — Inverse by modulo
Computes the inverse of a modulo b .
It can be either a GMP number resource, or a numeric string given that it is possible to convert the latter to a number.
It can be either a GMP number resource, or a numeric string given that it is possible to convert the latter to a number.
A GMP number on success or FALSE if an inverse does not exist.
Example #1 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";
?>
上例将输出：
9