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Request #13532 bit_count()
Submitted: 2001-10-03 13:10 UTC Modified: 2001-10-03 14:16 UTC
From: russlndr at online dot no Assigned:
Status: Closed Package: Feature/Change Request
PHP Version: 4.0.6 OS: All
Private report: No CVE-ID: None
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From: russlndr at online dot no
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 [2001-10-03 13:10 UTC] russlndr at online dot no 
Suggestion:
Add a function who can count number of bits who are set in a variable.

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 [2001-10-03 13:12 UTC] derick@php.net 
function bit_count($var) {
    return strlen($var) * 8;
}

It's very easy to do in PHP itself, thus I see no use for this function.

Derick
 [2001-10-03 14:16 UTC] rasmus@php.net 
I think he may have meant the number of bits set in a bit field.  Something like this should cover it:

function bit_count($num) {
    return strlen(str_replace('0','',decbin($num)));
}
 
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