gmp_popcount
(PHP 4 >= 4.0.4, PHP 5)
gmp_popcount -- Population count
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"
;
?>
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The printout of the above program will be:
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