php 向端口发送命令（通过 tcp）

Question

I am looking for a php script to trigger commands to a specific port via tcp. The script is running on the same machine that I would like to send those commands to, so the ip is 127.0.0.1 or localhost.

The command will be defined be whatever is written behind the url. For example, trigger.php?screen will send command 'screen', trigger.php?sound will send command 'sound' etc.

Is this possible? I don't have much coding knowledge.

This is it in a nutshell: when I open 127.0.0.1/trigger.php?sound I would like command sound to be sent to 127.0.0.1 port 33000 via tcp. If this is easier to implement with html or cgi, that would be fine, too.

Thanks in advance for your help.

Answer 1

Your trigger.php would go like this (changing an example from http://php.net/manual/en/sockets.examples.php to fit your problem;)

<?php
$DEBUG=1;

if ($DEBUG) {
     print "<pre>\n";
     error_reporting(E_ERROR | E_WARNING | E_PARSE);
     ini_set("display_errors", 1);
     ini_set('display_startup_errors',1);
}
if (isset($_SERVER['QUERY_STRING'])
    $cmd=$_SERVER['QUERY_STRING']; //get the command name
else
    $cmd="";

print "Command to trigger: $cmd\n";
if ($cmd!="") {
    $socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
    if ($socket === false) {
        echo "socket_create() failed: reason: " . socket_strerror(socket_last_error()) . "\n";
    } else {
        if ($DEBUG) print "Socket created successfully\n";
        $result = socket_connect($socket, "127.0.0.1", 33000);
        if ($result === false) {
            echo "socket_connect() failed.\nReason: ($result) " . socket_strerror(socket_last_error($socket)) . "\n";
        } else {
            if ($DEBUG) print "Connected successfully\n";
            socket_write($socket, $cmd, strlen($cmd));
            //Read and output possible response from the command sent
            echo "Response: ";
            while ($out = socket_read($socket, 2048)) {
                echo $out;
            }
        }
        socket_close($socket);
    }
}
if ($DEBUG) print "The end.</pre>\n";

?>

(Note i did not run it or do syntax check but looks like it might be what you want)

Answer 2

So I did some research about sending a telnet command via php and found a script similar to what I need. I have modified it and added user3134164's line to get the command name.

Script looks like this and works perfectly. I open phptrigger.php?command and whatever I put behind the question mark will be executed just as planned. Thanks a lot for your help, user3134164 :)

<?php
    $socket = fsockopen("localhost", "33000", $errno, $errstr); 
    $cmd=$_SERVER['QUERY_STRING']; 

    if($socket) 
    { 
        echo "Connected. <br /><br />"; 
    }
    else 
    { 
        echo "Connection failed!<br /><br />"; 
    }

    fputs($socket, "get /$cmd \r\n"); 
    $buffer = ""; 

    while(!feof($socket)) 
    { 
        $buffer .=fgets($socket, 4096); 
    } 

    print_r($buffer); 
    echo "<br /><br /><br />"; 

    var_dump($buffer); 

    fclose($socket); 
?>