gmp_popcount

Description

int gmp_popcount ( resource a )

Return the population count of a.

例子 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";
?>

The printout of the above program will be:

3
7