Php implements online port scan instance code

& Lt ;? Php $ youip $ HTTP_SERVER_VARS [REMOTE_ADDR]; $ remoteip $ HTTP_POST_VARS [remoteip];? & Gt; & lt; html & gt; & lt; head & gt; & lt; title & gt; php online Port detection & lt;/title & gt; & lt; metahttp-

1. $ Youip = $ HTTP_SERVER_VARS ["REMOTE_ADDR"];
   $ Remoteip = $ HTTP_POST_VARS [remoteip];
   ?>
5. Online Port detection using php
12. If (! Empty ($ remoteip )){
    Function err (){
    Die ("Sorry, this IP address is illegal

    Click here to return ");
    }
    // Defines the prompt message for an incorrect IP address submission.
    $ Ips = explode (".", $ remoteip );
    // Use. to separate IP addresses
    If (intval ($ ips [0]) <1 or intval ($ ips [0])> 255 or intval ($ ips [3]) <1 or intval ($ ips [3]> 255) err ();
    // If the number of the first and last IP segments is smaller than 1 or greater than 255, an error is returned.
    If (intval ($ ips [1]) <0 or intval ($ ips [1])> 255 or intval ($ ips [2]) <0 or intval ($ ips [2]> 255) err ();
    // If the number of the second and third IP addresses is less than 0 or greater than 255, an error is returned.
    $ Closed = This port is currently closed .;
    $ Opened = This port is currently open !;
    $ Close = "close ";
    $ Open = "open ";
    $ Port = array (80,110,135,137,138,139,143,443,445,143, 3389 );
    $ Msg = array (Ftp, Telnet, Smtp, Finger, Http, Pop3, Location Service, Netbios-NS, Netbios-DGM, Netbios-SSN, IMAP, Https, Microsoft-DS, MSSQL, MYSQL, Terminal Services );
    // After checking the IP format, use an array to define the service name and status of each port.
    Echo"

    
    
    
    
    ";Echo" ";Echo" ";Echo" ";Echo"

    IP address you scanned: ". $ remoteip ."

    ";
    Echo"
    
    
    
    
    
    
    
    {
    $ Fp = @ fsockopen ($ remoteip, $ port [$ I], & $ errno, & $ errstr, 1 );
    If (! $ Fp ){
    Echo"
    
    
    
    
    
    
    ";Echo" ";Echo" ";Echo" ";Echo" ";Echo" ";Echo" ";// Output the displayed tableFor ($ I = 0; $ I ";} Else {Echo" ";}}// Use the for statement to connect the port of the remote host using the fsockopen function and output the result.Echo" ";Echo"Echo"

    Port	Service	Detection result	Description
    ". $ Port [$ I]."	". $ Msg [$ I]."	". $ Close ."	". $ Closed ."
    ". $ Port [$ I]."	". $ Msg [$ I]."	". $ Open ."	". $ Opened ."
    "; Echo "continue scanning >>>

    ";
    Echo"
    
    
    
    ";Echo" ";Echo" ";Echo" ";Echo"

    Port scan

    ";
    Echo"";
    Echo"";
    Echo"";
    Exit;