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# gmp_invert

(PHP 4 >= 4.0.4, PHP 5)

gmp_invert -- Inverse by modulo

## Description

resource gmp_invert ( resource a, resource b )

Computes the inverse of a modulo b. Returns `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"; ?>`

The printout of the above program will be:

    9

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