PHP ssh working from command line, not working from web page

Question

I am using PHP to ssh into a main computer and run a command. My code is posted below but I'm stuck having the following issue:

When I run this command from the Ubuntu command line it works flawlessly. However when I try and run it via the web page I believe the ssh commands are not running. Not sure if I am running into issues with permissions, or if I am running into issues with my actually ssh command in php. Any help would be appreciated.

    $cmd = "ssh name@ip 'echo hello'";
    $var = shell_exec($cmd);
    echo $var;

Answer 1

Rather than using shell_exec (which may be disabled for security reasons), look into using libssh2 .

Reference : http://php.net/manual/en/book.ssh2.php

Answer 2

我的猜测是，运行Web服务器的用户的〜/ .ssh目录中没有您的私钥文件。