在CodeIgniter控制器中建立SSH连接

最近我遇到了这个库，它允许我通过ssh连接到远程机器。(这种情况下，假冒123.45.67.890。图书馆是shukydvir。

我按照overview标签给出的说明，然而，如下所示:

public function deploy_test()
{
    $params = array( 
                'hostname' => "123.45.67.890",
                'port' => 23,
                'username' => "username",
                'password' => "password"
                );
    if(!($con = $this->ssh->connect($params))) {
        echo json_encode("fail: unable to establish connection'n");
    }
    else {
        echo json_encode("helloworld");
    }
}

返回的结果是:

fail: unable to establish connection

因此，厌倦了，我安装了ssh2库，并重申了我的服务器:

public function deploy_test() {
    $connection = ssh2_connect("123.45.67.890", 23);
    if(!$connection) {
       echo json_encode('Connection failed');
    }
    ssh2_auth_password($connection, "username", "password");
    $stream = ssh2_exec($connection, "ls -l");
    stream_get_blocking($stream, true);
    $output = "";
    while($line = fgets($stream)) {
        $output .= $line;
    }
    echo json_encode($line);
}

结果并不令人鼓舞:

<p>Severity: Warning</p>
<p>Message:  ssh2_connect(): Unable to connect to 123.45.67.890 on port 23</p>
<p>Filename: controllers/automation.php</p>
<p>Line Number: 70</p>

然而，当我从test.php文件执行相同的脚本时，我得到:

02/13/2013  10:41 PM              .
02/13/2013  10:41 PM              ..
02/13/2013  10:41 PM               952 FreeSSHd.lnk
               1 File(s)            952 bytes
               2 Dir(s)  55,343,263,744 bytes free

另一个服务器已经安装了freSSHD，并且它已经准备好进行连接。我已经尽力了。有人能帮帮我吗?