php根據子網路遮罩和ip計運算元網

標籤：

$ip = ‘192.168.6.1‘;$mask = ‘255.255.2.0‘;$sub_net = array();//子網$ip_explode = explode(‘.‘, $ip);$mask_explode = explode(‘.‘, $mask);foreach ($ip_explode as $key => $ip_num) {    //10進位轉2進位    $a = decbin($ip_num);    $b = decbin($mask_explode[$key]);    //補0補夠8位    $a = sprintf("%08d", $a);    $b = sprintf("%04d", $b);//前補0    $b = sprintf("%0.4f", $b);//後取多少位    echo $a."==".$b."\n";    $c = $a & $b;    echo $c."\n";    $d = bindec($c);    echo $d."\n";    $sub_net[] = $d;}$sub_net = implode(‘.‘, $sub_net);echo $sub_net;

php根據子網路遮罩和ip計運算元網