gmp_pow

(PHP 4 >= 4.0.4, PHP 5)

gmp_pow — Raise number into power

Description

resource gmp_pow ( resource $base , int $exp )

Raise base into power exp.

Parameters

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.

Return Values

The new (raised) number, as a GMP number. The case of 0^0 yields 1.

Examples

Example #1 gmp_pow() example

<?php
$pow1 = gmp_pow("2", 31);
echo gmp_strval($pow1) . "\n";
$pow2 = gmp_pow("0", 0);
echo gmp_strval($pow2) . "\n";
$pow3 = gmp_pow("2", -1); // Negative exp, generates warning
echo gmp_strval($pow3) . "\n";
?>

The above example will output:

2147483648
1