register.php

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<?php
elgg_make_sticky_form('register');

// Get variables
$username = get_input('username');
$password = get_input('password', null, false);
$password2 = get_input('password2', null, false);
$email = get_input('email');
$name = get_input('name');
$friend_guid = (int) get_input('friend_guid', 0);
$invitecode = get_input('invitecode');

if (elgg_get_config('allow_registration')) {
    try {
        if (trim($password) == "" || trim($password2) == "") {
            throw new RegistrationException(elgg_echo('RegistrationException:EmptyPassword'));
        }

        if (strcmp($password, $password2) != 0) {
            throw new RegistrationException(elgg_echo('RegistrationException:PasswordMismatch'));
        }

        $guid = register_user($username, $password, $name, $email);

        if ($guid) {
            $new_user = get_entity($guid);

            // allow plugins to respond to self registration
            // note: To catch all new users, even those created by an admin,
            // register for the create, user event instead.
            // only passing vars that aren't in ElggUser.
            $params = array(
                'user' => $new_user,
                'password' => $password,
                'friend_guid' => $friend_guid,
                'invitecode' => $invitecode
            );

            // @todo should registration be allowed no matter what the plugins return?
            if (!elgg_trigger_plugin_hook('register', 'user', $params, TRUE)) {
                $ia = elgg_set_ignore_access(true);
                $new_user->delete();
                elgg_set_ignore_access($ia);
                // @todo this is a generic messages. We could have plugins
                // throw a RegistrationException, but that is very odd
                // for the plugin hooks system.
                throw new RegistrationException(elgg_echo('registerbad'));
            }

            elgg_clear_sticky_form('register');

            if ($new_user->enabled == "yes") {
                system_message(elgg_echo("registerok", array(elgg_get_site_entity()->name)));

                // if exception thrown, this probably means there is a validation
                // plugin that has disabled the user
                try {
                    login($new_user);
                    // set forward url
                    $session = elgg_get_session();
                    if ($session->has('last_forward_from')) {
                        $forward_url = $session->get('last_forward_from');
                        $forward_source = 'last_forward_from';
                    } else {
                        // forward to main index page
                        $forward_url = '';
                        $forward_source = null;
                    }
                    $params = array('user' => $new_user, 'source' => $forward_source);
                    $forward_url = elgg_trigger_plugin_hook('login:forward', 'user', $params, $forward_url);
                    forward($forward_url);
                } catch (LoginException $e) {
                    register_error($e->getMessage());
                    forward(REFERER);
                }
            }

            // Forward on success, assume everything else is an error...
            forward();
        } else {
            register_error(elgg_echo("registerbad"));
        }
    } catch (RegistrationException $r) {
        register_error($r->getMessage());
    }
} else {
    register_error(elgg_echo('registerdisabled'));
}

forward(REFERER);