php - 如何通过 ssh 在 PHP 中执行远程命令？

Question

我正在尝试通过 ssh 从 php 脚本中执行远程命令，我希望将命令(stdout 和 stderr)的输出流式传输到原始主机。

我知道在 Perl 和 Ruby 中这是可能的。我在 php 中找不到任何此类示例。

代码:

$ip = 'kssotest.yakabod.net';
$user = 'tester';
$pass = 'kmoon77';

$connection = ssh2_connect($ip);
ssh2_auth_password($connection,$user,$pass);
$shell = ssh2_shell($connection,"bash");

$cmd = "echo '[start]';your commands here;echo '[end]'";
$output = user_exec($shell,$cmd);

fclose($shell);

function user_exec($shell,$cmd) {
  fwrite($shell,$cmd . "\n");
  $output = "";
  $start = false;
  $start_time = time();
  $max_time = 2; //time in seconds
  while(((time()-$start_time) < $max_time)) {
    $line = fgets($shell);
    if(!strstr($line,$cmd)) {
      if(preg_match('/\[start\]/',$line)) {
        $start = true;
      }elseif(preg_match('/\[end\]/',$line)) {
        return $output;
      }elseif($start){
        $output[] = $line;
      }
    }
  }
}

但是当我像这样执行它时 $php remote.php，我得到一个错误:

PHP Fatal error:  Call to undefined function ssh2_connect() 
in /home/tester/PHP_SSH2/remote.php on line 6

通过 ssh 在 PHP 中执行远程命令的最佳方式是什么？

Answer 1

如果你因为繁文缛节而无法添加 php 包，这里有一个简单的类可以解决这个问题

class ExecuteRemote
{
    private static $host;
    private static $username;
    private static $password;
    private static $error;
    private static $output;

    public static function setup($host, $username=NULL, $password=NULL)
    {
        self::$host = $host;
        self::$username = $username;
        self::$password = $password;
    }

    public static function executeScriptSSH($script)
    {
        // Setup connection string
        $connectionString = self::$host;
        $connectionString = (empty(self::$username) ? $connectionString : self::$username.'@'.$connectionString);

        // Execute script
        $cmd = "ssh $connectionString $script 2>&1";
        self::$output['command'] = $cmd;
        exec($cmd, self::$output, self::$error);

        if (self::$error) {
            throw new Exception ("\nError sshing: ".print_r(self::$output, true));
        }

        return self::$output;
    }
}