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
    To Top