PHP在页面上的函数之间共享fsockopen - PHP Share fsockopen between functions on page

PHP Share fsockopen between functions on page

本文关键字：函数之间共享 fsockopen PHP | 更新日期: 2023-09-27

是否可以用一个函数打开一个套接字，并用另一个函数从同一页面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

您需要全局存储指针或通过引用传递指针。

有一种方法

$fp = connect($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);
}

我不确定这个代码将生活在什么样的环境中，所以很难提出不同或更好的策略。我可能会像这样面向对象地做：

$command = new Command($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);
    }
}