使用PHP显示完整的1-128位十进制到二进制

Question

我知道这种接缝很容易,但我对这种特殊情况有疑问.我已经知道如何使用PHP将十进制转换为二进制,但我想显示完整的位序列,但令人惊讶的是,我不知道如何.

转换必须是这样的:

converting 127(decimal) to binary using PHP = 1111111. the bit sequence is 1-128 for every 
octet(IP Address) so this must output = 01111111 even 128 is not used.
2nd Example:
1(decimal) to binary = 01. Want to display the full 1-128 binary sequence even if
128,64,32,16,8,4,2 is not used it must be like this 00000001 not 01.

这是我的PHP代码:

<?php

        $octet1 = $_POST["oct1"];
        $octet2 = $_POST["oct2"];
        $octet3 = $_POST["oct3"];
        $octet4 = $_POST["oct4"];
        echo decbin($octet1) ," ", decbin($octet2) ," ", decbin($octet3) ," ", decbin($octet4);

    ?>

这只显示缩短的二进制文件,如下所示:

16 to binary is 10000 or but i want to display this 00010000(Full length)

我怎样才能做到这一点？

Answer 1

如何使用sprintf与b格式说明:

echo sprintf("%08b", 127);
// 01111111
echo sprintf("%08b.%08b.%08b.%08b", 127, 0, 0, 1);
// 01111111.00000000.00000000.00000001