gmp_popcount

(PHP 4 >= 4.0.4, PHP 5, PHP 7, PHP 8)

gmp_popcountPopulation count

说明

gmp_popcount ( GMP|int|string $num ) : int

Get the population count.

参数

num

GMP 对象或 int ,或数字string

返回值

The population count of num, as an int.

范例

示例 #1 gmp_popcount() example

<?php
$pop1 
gmp_init("10000101"2); // 3 1's
echo gmp_popcount($pop1) . "\n";
$pop2 gmp_init("11111110"2); // 7 1's
echo gmp_popcount($pop2) . "\n";
?>

以上例程会输出:

3
7