PHP SSH2 执行程序“$”

PHP SSH2 exec "$"

我想知道如何在 PHP 中从 GET 命令 运行... 这是我的代码:

<?php
$msg = $_GET['msg'];
echo "$msg test";
if (!function_exists("ssh2_connect")) die("function ssh2_connect doesn't exist");
if(!($con = ssh2_connect("ip", 22))){
    echo "fail: unable to establish connection\n";
} else {
    // try to authenticate with username root, password secretpassword
    if(!ssh2_auth_password($con, "root", "password")) {
        echo "fail: unable to authenticate\n";
    } else {
        // allright, we're in!

        echo "okay: logged in...\n";


        // execute a command
       if (!($stream = ssh2_exec($con, 'wall echo $msg'))) {

            echo "fail: unable to execute command\n";
        } else {
            // collect returning data from command
            stream_set_blocking($stream, true);
            $data = "";
            while ($buf = fread($stream,4096)) {
                $data .= $buf;
            }
            fclose($stream);
        }
    }
}
?>

所以,它不会屏蔽我在 ?msg= 中所说的内容...它只是写空白,但是当我回显 $msg(就像我在代码顶部所做的那样)时,它会正常写入,你们知道吗问题在哪里?我已经尝试了 "echo $msg" 和 \"echo $msh\" 但同样的事情...谢谢并致以最诚挚的问候!

将 GET 变量传递给 ssh2_exec() 可能是一个巨大的安全问题。但忽略这一点,单引号会忽略变量 - 你需要双引号。

换句话说:改变这个

if (!($stream = ssh2_exec($con, 'wall echo $msg'))) {

至此

if (!($stream = ssh2_exec($con, "wall echo $msg"))) {

但是,我怀疑您正试图将 echo 用作 PHP 构造,而您真正只对 $msg 变量感兴趣。在那种情况下,你可以做

if (!($stream = ssh2_exec($con, "wall $msg"))) {

if (!($stream = ssh2_exec($con, 'wall ' . $msg))) {