PHP Australia Conference 2015

gmp_pow

(PHP 4 >= 4.0.4, PHP 5)

gmp_powRaise number into power

说明

GMP gmp_pow ( GMP $base , int $exp )

Raise base into power exp.

参数

base

The base number.

可以是一个 GMP 数据 resouce,或一个可以转换为数值的字符串。

exp

The positive power to raise the base.

返回值

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

范例

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";
?>

以上例程会输出:

2147483648
1

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User Contributed Notes 1 note

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rahulkadukar at yahoo dot com
3 years ago
A Sample code can be shown as

<?php
echo gmp_strval(gmp_pow(4,4)); //This would give the answer as 256
?>
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