GMP Functions
PHP Manual

gmp_invert

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

gmp_invertInverse by modulo

Description

GMP gmp_invert ( GMP $a , GMP $b )

Computes the inverse of a modulo b.

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 GMP number on success or FALSE if an inverse does not exist.

Examples

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";
?>

The above example will output:

9


GMP Functions
PHP Manual

copyright  ©  November 16 2019 sean dreilinger url: https://durak.org/sean/pubs/software/php-7.0.0/function.gmp-invert.html