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See Release Notes
Long Term Support Release

  • Bug fixes for general core bugs in 4.1.x will end 13 November 2023 (12 months).
  • Bug fixes for security issues in 4.1.x will end 10 November 2025 (36 months).
  • PHP version: minimum PHP 7.4.0 Note: minimum PHP version has increased since Moodle 4.0. PHP 8.0.x is supported too.
/course/ -> loginas.php (source)
<?php
// Allows a teacher/admin to login as another user (in stealth mode).

require_once('../config.php');
require_once('lib.php');

$id       = optional_param('id', SITEID, PARAM_INT);   // course id
$redirect = optional_param('redirect', 0, PARAM_BOOL);

$url = new moodle_url('/course/loginas.php', array('id'=>$id));
$PAGE->set_url($url);

// Reset user back to their real self if needed, for security reasons you need to log out and log in again.
if (\core\session\manager::is_loggedinas()) {
    require_sesskey();
    require_logout();

    // We can not set wanted URL here because the session is closed.
    redirect(new moodle_url($url, array('redirect'=>1)));
}

if ($redirect) {
    if ($id and $id != SITEID) {
        $SESSION->wantsurl = "$CFG->wwwroot/course/view.php?id=".$id;
    } else {
        $SESSION->wantsurl = "$CFG->wwwroot/";
    }

    redirect(get_login_url());
}

// Try log in as this user.
$userid = required_param('user', PARAM_INT);

require_sesskey();
$course = $DB->get_record('course', array('id'=>$id), '*', MUST_EXIST);

// User must be logged in.

$systemcontext = context_system::instance();
$coursecontext = context_course::instance($course->id);

require_login();

if (has_capability('moodle/user:loginas', $systemcontext)) {
    if (is_siteadmin($userid)) {
< print_error('nologinas');
> throw new \moodle_exception('nologinas');
} $context = $systemcontext; $PAGE->set_context($context); } else { require_login($course); require_capability('moodle/user:loginas', $coursecontext); if (is_siteadmin($userid)) {
< print_error('nologinas');
> throw new \moodle_exception('nologinas');
} if (!is_enrolled($coursecontext, $userid)) {
< print_error('usernotincourse');
> throw new \moodle_exception('usernotincourse');
} $context = $coursecontext; // Check if course has SEPARATEGROUPS and user is part of that group. if (groups_get_course_groupmode($course) == SEPARATEGROUPS && !has_capability('moodle/site:accessallgroups', $context)) { $samegroup = false; if ($groups = groups_get_all_groups($course->id, $USER->id)) { foreach ($groups as $group) { if (groups_is_member($group->id, $userid)) { $samegroup = true; break; } } } if (!$samegroup) {
< print_error('nologinas');
> throw new \moodle_exception('nologinas');
} } } // Login as this user and return to course home page. \core\session\manager::loginas($userid, $context); // Add a notification to let the logged in as user know that all content will be force cleaned // while in this session. \core\notification::info(get_string('sessionforceclean', 'core')); $newfullname = fullname($USER, true); $strloginas = get_string('loginas'); $strloggedinas = get_string('loggedinas', '', $newfullname); $PAGE->set_title($strloggedinas); $PAGE->set_heading($course->fullname); $PAGE->navbar->add($strloggedinas); notice($strloggedinas, "$CFG->wwwroot/course/view.php?id=$course->id");