Mediawiki add user from custom registration page - php

Question

I set up a custom registration page to my http server (apache) which hosts a number of services, including a wiki.
The intended goal is to have the user sign-up at once to all these services including the wiki of course.
For the wiki I'm trying to rearrange the "CreateAndPromote" maintenance script and fit it into my page. By now I came up with this snippet
$path = "/wiki";
putenv("MW_INSTALL_PATH={$path}");
require_once ("/wiki/includes/WebStart.php");
chdir("wiki");
$mediaWiki = new MediaWiki();
$name = $_POST['username'];
$pass = $_POST['password'];
$user = User::newFromName( $name );
if ( !is_object( $user ) ) {
die("Invalid user!\n");
}
$exists = ( 0 !== $user->idForName() );
if ( !$exists ) {
$user->addToDatabase();
}
try {
$user->setPassword( $pass );
} catch ( PasswordError $pwe ) {
die("password error:" . $pwe->getText()."");
}
$user->addGroup("editor");
$user->saveSettings();
$ssu = new SiteStatsUpdate( 0, 0, 0, 0, 1 );
$ssu->doUpdate();
But i get
Error: LightnCandy class not defined
MediaWiki 1.25.2
PHP 5.6.12 (apache2handler)

Answer 1

The problem was simple as that:
declaring the MW_INSTALL_PATH like that apparently did not work
$path = "/wiki";
putenv("MW_INSTALL_PATH={$path}");
require_once ("/wiki/includes/WebStart.php");
so I had to change dir to the wiki BEFORE requiring the webstart.php
chdir("wiki");
require_once ("/includes/WebStart.php");