gmp_popcount

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

gmp_popcount — Population count

Description

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

Get the population count.

Parameters

num: A GMP object, an int or a numeric string.

Return Values

The population count of num, as an int.

Examples

Example #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 above example will output:

3
7

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