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(PHP 4 >= 4.0.4, PHP 5, PHP 7)
gmp_pow — Raise number into power
$base
, int $exp
)
Raise base
into power exp
.
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
.
The new (raised) number, as a GMP number. The case of 0^0 yields 1.
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
[#1] rahulkadukar at yahoo dot com [2011-05-16 06:11:53]
A Sample code can be shown as
<?php
echo gmp_strval(gmp_pow(4,4)); //This would give the answer as 256
?>