(PHP 4 >= 4.0.4, PHP 5, PHP 7)
Inverse by modulo
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.
Returns:
A GMP number on success or FALSE if an inverse does not exist.
Examples:
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
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