GET the population count of 1 in a given GMP number as an INTEGER, considering this number in base 2.
<?php
int gmp_popcount ( GMP|int|string $num )
where,
$num = The GMP number to count the population
?>
EXERCISE
<?php
// All values are considered in base 2,
// therefore, converted to this base
$arr01 = [ 2021, '011111100101', '03745', '0x7e5'];
foreach($arr01 as $a)
{
$popc01 = gmp_popcount($a);
echo 'gmp_popcount( ' . $a . ' ) = ' . $popc01 . '<br><br>';
}
?>
EXERCISE
<?php
// All values are considered in base 2,
// therefore, converted to this base
echo "gmp_popcount(-1) = " .
gmp_popcount(-1) . '<br><br>';
echo "gmp_popcount(0) = " .
gmp_popcount(0) . '<br><br>';
echo "gmp_popcount(12123) = " .
gmp_popcount(12123) . '<br><br>';
echo "gmp_popcount(\"52638927634234\") = " .
gmp_popcount("52638927634234") . '<br><br>';
echo "gmp_popcount(\"-23476123423433\") = " .
gmp_popcount("-23476123423433") . '<br><br>';
echo "gmp_popcount(PHP_INT_MAX) = " .
gmp_popcount(PHP_INT_MAX) . '<br><br>';
$n = gmp_init("9876546789222");
echo "gmp_popcount($n) = " .
gmp_popcount($n) . '<br><br>';
try {
var_dump(gmp_popcount(array()));
} catch (\TypeError $e) {
echo $e->getMessage() . "<br><br>";
}
?>