gmp_pow

Description

resource gmp_pow ( resource base, int exp )

Raise base into power exp. The case of 0^0 yields 1. exp cannot be negative.

例子 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 printout of the above program will be:

2147483648
1