可以参看我的笔记介绍SSH2的

连接到远程shell:

$connection = ssh2_connect('example.com', 22);

if (ssh2_auth_password($connection, 'root', 'password')) {
    echo "Authentication Successful!\n";
} else {
    die('Authentication Failed...');
}

执行命令:

$stream = ssh2_exec($connection, 'mysql -uroot -p密码;use 数据库名;select * from table_name');

获取返回结果:

stream_set_blocking($stream, true);
$stream_out = ssh2_fetch_stream($stream, SSH2_STREAM_STDIO);
echo stream_get_contents($stream_out);