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php高速计算子网掩码的前缀长度

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Release： 2016-06-13 13:05:17
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php快速计算子网掩码的前缀长度

$len=0;
$netmask="255.255.255.0";
$split_mask=explode('.',$netmask);
foreach($split_mask as $v)
{
??? $len+=8-log(256-$v,2);
}
echo $len;
?>

Related labels：
mask php split
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