IP address conversion to decimal implementation program

, take the IP address of "61.175.232.30" as an example, the IP address is converted to a number string method as follows: First convert "61.175.232.30" to hexadecimal "3d.af.e8.1e", then remove the decimal point and change to "3dafe81e", Finally converts this hexadecimal number to decimal "1034938398", then "61.175.232.30" becomes "1034938398".

Method One:

code is as follows	copy code
Public Function Iptolong () {         $ ip = $_server[' remote_addr '];         $ip = Explode ('. ', $IP);         $ip = Array_reverse ($IP);//array inversion          $r = 0;         for ($i =0, $j =count ($IP); $i < $j; $i + +) {              $r + + $ip [$i] * POW (256, $i);        }         $r = sprintf ("%u", $r);         Echo $r; }

Method Two:

The code is as follows	Copy Code
Public Function Iptolong () { $ip = $_server[' remote_addr ']; $ip = Explode ('. ', $IP); $r = ($ip [0] << 24) | ($ip [1] << 16) | ($ip [2] << 8) | $IP [3]; if ($r < 0) $r + = 4294967296; Echo $r; }

Tested local IP is: 192.168.1.101, two method conversion result is 3232235877

Ping 192.168.1.101 and ping 3232235877 are the same.

The following provides code for implementing IP address translation in C #:

Code

The code is as follows

Copy Code

//IP Address        string Ip = "61.175.232.30";        //Remove IP address remove '. ' The string array        string [] ip_list = Ip.split ("."). ToCharArray ());        String x_ip = "";       //loop array, convert data to hexadecimal number, and merge array (3dafe81e)         foreach (string IP in ip_list)        {                 X_ip + = convert.toint16 (Ip). ToString ("X");       }       //convert hexadecimal numbers to decimal (1034938398)        Long N_ip = long. Parse (X_IP, System.Globalization.NumberStyles.HexNumber);

      OK, so the conversion is successful, no, you can test with Windows command-line tools, ping 61.175.232.30 and ping 1034938398 are the same effect, All point to 61.175.232.30.