= 4.0.4, PHP 5, PHP 7, PHP 8)gmp_popcount — Population count說明gmp_popcount(GMP|int|string $num): intGet the population count. 參數(shù)nu">

gmp_popcount

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

gmp_popcount — Population count

說明

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

Get the population count.

參數(shù)

num

GMP 對(duì)象或 int ，或數(shù)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";
?>

以上例程會(huì)輸出：

3
7