Question

是否可以使用一个功能打开一个套接字，并使用同一页面中的另一个函数向该套接字发送命令？

当我尝试这个时，我得到：Warning: fputs(): supplied argument is not a valid stream resource

这是我正在使用的代码

connect();
cmd("cd /home/tom\n ls\n");
close();

function connect () {
    global $passwd;
    if (!$fp = @fsockopen("127.0.0.1", 23, $errno, $errstr, 5)) {
        exit('Login Failed');
    }
    stream_set_timeout($fp, 1);

    fputs($fp, "tom\n"); sleep(1);
    fputs($fp, "$passwd\n"); sleep(1);
    $res = fread($fp,1024);
    var_dump($res);
}

function cmd ($cmd) {
    global $fp;
    fputs($fp, $cmd); sleep(1);
    $res = fread($fp,1024);
    var_dump($res);
}

function close () {
    global $fp;
    fclose($fp);
}

知道如何让它发挥作用吗？感谢

Answer 1

您需要全局存储指针或通过引用传递它。

这是一种方法

$fp = connect($passwd);
cmd($fp, "cd /home/tom\n ls\n");
close($fp);

function connect ($passwd) {
    if (!$fp = @fsockopen("127.0.0.1", 23, $errno, $errstr, 5)) {
        exit('Login Failed');
    }
    stream_set_timeout($fp, 1);

    fputs($fp, "tom\n"); sleep(1);
    fputs($fp, "$passwd\n"); sleep(1);
    $res = fread($fp,1024);
    var_dump($res);

    return $fp;
}

function cmd ($fp, $cmd) {
    fputs($fp, $cmd); sleep(1);
    $res = fread($fp,1024);
    var_dump($res);
}

function close ($fp) {
    fclose($fp);
}

我不确定此代码的生存环境，因此很难提出不同或更好的策略。我可能会这样做面向我的自我：

$command = new Command($passwd);
if($command->connect()){
    $res = $command->cmd("cd /home/tom\n ls\n");
    // Use $result of cmd() here

    $command->close(); // close when done
}

class Command {

    private $fp;
    private $passwd;

    public function __construct($passwd) {
        $this->passwd = $passwd;
    }

    public function connect () {
        if (!$p = @fsockopen("127.0.0.1", 23, $errno, $errstr, 5)) {
            return false; // Or throw an exception
        }
        stream_set_timeout($fp, 1);

        fputs($fp, "tom\n"); sleep(1);
        fputs($fp, "$passwd\n"); sleep(1);
        $res = fread($fp,1024);
        var_dump($res);

        $this->fp = $fp;
        return true; // Or $res if you want to use it somewhere else
    }

    function cmd ($cmd) {
        $fp = $this->fp;

        fputs($fp, $cmd); sleep(1);
        $res = fread($fp,1024);
        var_dump($res);

        return $res; // if you want to use it else where
    }

    function close () {
        fclose($this->fp);
    }
}

PHP在页面上的函数之间共享fsockopen

1 个答案: