gmp_popcount
A Sample code can be shown as
<?php
echo gmp_strval(gmp_pow(4,4)); //This would give the answer as 256
?>
gmp_pow
(PHP 4 >= 4.0.4, PHP 5)
gmp_pow — Raise number into power
说明
resource gmp_pow
( resource
$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
gmp_pow - [1 notes]
rahulkadukar at yahoo dot com ¶
2 years ago