can be used for RSA encryption/decryption!
gmp_powm
(PHP 4 >= 4.0.4, PHP 5)
gmp_powm — Raise number into power with modulo
Beskrivelse
resource gmp_powm
( resource
$base
, resource $exp
, resource $mod
)
Calculate (base raised into power
exp) modulo mod. If
exp is negative, result is undefined.
Parametre
-
base -
The base 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.
-
exp -
The positive power to raise the
base.It can be either a GMP number resource, or a numeric string given that it is possible to convert the latter to a number.
-
mod -
The modulo.
It can be either a GMP number resource, or a numeric string given that it is possible to convert the latter to a number.
Returnerings Værdier
The new (raised) number, as a GMP number.
Eksempler
Eksempel #1 gmp_powm() example
<?php
$pow1 = gmp_powm("2", "31", "2147483649");
echo gmp_strval($pow1) . "\n";
?>
The above example will output:
2147483648
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