PHP 7.0.0 RC 1 Released


(PECL ssh2 >= 0.9.0)

ssh2_auth_passwordAuthenticate over SSH using a plain password


bool ssh2_auth_password ( resource $session , string $username , string $password )

Authenticate over SSH using a plain password. Since version 0.12 this function also supports keyboard_interactive method.



An SSH connection link identifier, obtained from a call to ssh2_connect().


Remote user name.


Password for username

Return Values

Returns TRUE on success or FALSE on failure.


Example #1 Authenticating with a password


if (
ssh2_auth_password($connection'username''secret')) {
"Authentication Successful!\n";
} else {
'Authentication Failed...');

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User Contributed Notes 3 notes

sgchris at gmail dot com
1 month ago
Please note that the function ssh2_auth_password raises PHP warning(!) on bad authentication. To avoid the warning, use the "silence" ("@") operator.

= ssh2_connect($host);
if (
false === $ssh) {
'connection failed');

$auth = @ssh2_auth_password($ssh, $user, $password);
if (
false === $auth) {
'authentication failed');
wally at soggysoftware dot co dot uk
8 years ago
This function is useful for authenticating website clients against local (or remote) Unix users.

I'd played around with Apache+PAM, various mod_auths and homebrewed shell programs and even NIS, but to authenticate a user against a Unix shadow file fundamentally requires root priviledges, so either your PHP script needs root or an external program needs it's sticky bit set.  Both of these have *serious* security implications.

Using SSH, the overhead is obviously going to be greater but you're trusting a root service that's been (and continues to be) really well tested.  Just try authing with SSH against localhost (or another host if you want).
noels01 at gmx dot net
9 years ago
Do not try to authenticate or log in more than once on a ssh2 connection. It won't work. You'll need a new connection via ssh2_connect() which will result in a poor performance if you're doing several connects to the same server.
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