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PHP : Function Reference : GMP Functions : gmp_popcount

gmp_popcount

Population count (PHP 4 >= 4.0.4, PHP 5)
int gmp_popcount ( resource a )

Example 805. gmp_popcount() example

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<?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:

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3

7

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