SSH2如果登录失败=退出。 PHP

Question

how would i make this code, exit or quit if the login to the ssh2 fails.

            $query = mysql_query("SELECT * FROM ssh2");
            while($row = mysql_fetch_array($query)){
            $ip = $row['ip'];
            $user = $row['user'];
            $pass = $row['pass'];
            $ssh = ssh2_connect($ip, 22);
            ssh2_auth_password($ssh, $user, $pass);

Answer 1

The documentation on ssh2_auth_password() says:

Returns TRUE on success or FALSE on failure.

So you can just check if it returns false

if(ssh2_auth_password($ssh, $user, $pass) === false) {
    //do stuff if it can't login
}

While you're doing that, you may also want to add some error checking to the ssh2_connect() call, as it can return a non-resource if it was unable to connect.

$ssh = ssh2_connect($ip, 22);
if($ssh === false) {
    //do stuff if it can't connect
}

Edit for comment

If you'd like to have it fallback on another login attempt, you can do it a couple of ways. If you'll just have one more set of credentials, you can simply duplicate the if inside of itself.

//try the first login
if(ssh2_auth_password($ssh, $user, $pass) === false) {
    //try the second set
    if(ssh2_auth_password($ssh, $user2, $pass2) === false) {
        //do stuff if it can't login
    }
}

Alternatively, if you have a large number of credentials to try, you can store them in an array and loop over it

$creds = array(
    array('user' => $user, 'pass' => $pass),
    array('user' => $user2, 'pass' => $pass2),
    //etc
);

$logged_in = false;
foreach($creds as $cred) {
    if(ssh2_auth_password($ssh, $cred['user'], $cred['pass'])) {
        $logged_in = true;
        break;
    }
}

if(!$logged_in) {
    //do stuff when you can't login
}