php curl CURLOPT_PASSWDFUNCTION选项

Question

I can't use php's curl option CURLOPT_PASSWDFUNCTION, get notice:

PHP Notice:  Use of undefined constant CURLOPT_PASSWDFUNCTION - assumed 'CURLOPT_PASSWDFUNCTION'

Sample:

function get_passwd($ch, $string, $length){
    return 'password';
}
curl_setopt($ch, CURLOPT_PASSWDFUNCTION, 'get_passwd');

PHP info:

PHP 5.4.40 (cli) (built: Apr 29 2015 02:17:51) Copyright (c) 1997-2014 The PHP Group Zend Engine v2.4.0, Copyright (c) 1998-2014 Zend Technologies

What i do wrong?

UPD: curl is working, when i execute my code i get message "please enter password", i enter password and get data over ssl using ecnryption and certificate. I want just avoid manual entering password.

Answer 1

Seems that this functionality has been removed:

CURLOPT_PASSWDFUNCTION
Introduced in 7.4.2
Deprecated since 7.11.1
Last used in 7.11.1

latest curl release is 7.42.1