Bigbluebutton API getmeetings (PHP) Moodle

bbb_api_getmeetings.php

//https://docs.bigbluebutton.org/dev/api.html#getmeetings

// Adhoc task that keep updating the BBB load params every X minutes.

$bbb_api_getmeetings_xml = file_get_contents('https://bbb-service.edu/bigbluebutton/api/getMeetings?checksum=7fd047728b989f36bffdc3337a08f334a5');

        $xml = simplexml_load_string($bbb_api_getmeetings_xml, "SimpleXMLElement", LIBXML_NOCDATA);
        $json = json_encode($xml);
        $meeting_array = json_decode($json,TRUE);

        //var_dump($meeting_array['meetings']);
        //die;

        $bbb_usersessions = 0;
        $bbb_usersessions_video = 0;
        $bbb_usersessions_audio = 0;

        $meetingid = 0;
        $display_meeting = [];
        foreach($meeting_array['meetings']['meeting'] as $meeting) {
            $display_meeting[$meetingid]['meetingName'] = $meeting['meetingName'];
            $display_meeting[$meetingid]['createDate'] = $meeting['createDate'];
            $display_meeting[$meetingid]['running'] = $meeting['running'];
            $display_meeting[$meetingid]['moderatorCount'] = $meeting['moderatorCount'];
            $display_meeting[$meetingid]['participantCount'] = $meeting['participantCount'];
            $display_meeting[$meetingid]['videoCount'] = $meeting['videoCount'];
            $display_meeting[$meetingid]['voiceParticipantCount'] = $meeting['voiceParticipantCount'];

            $meetingid++;

            $bbb_usersessions .= (int)$meeting['participantCount'];
            $bbb_usersessions_video .= (int)$meeting['videoCount'];
            $bbb_usersessions_audio .= (int)$meeting['voiceParticipantCount'];
        }
        //var_dump($display_meeting);

        $bbb_rooms = count($meeting_array['meetings']['meeting']);
        // TESTing...
        //$bbb_usersessions = 60;
        //$bbb_usersessions_video = 45;
        //$bbb_usersessions_audio = 60;

        //mtrace("debug: BBB rooms = ".$bbb_rooms );
        set_config('bbb_rooms', $bbb_rooms, 'local_bbb');
        set_config('bbb_usersessions', $bbb_usersessions, 'local_bbb');
        set_config('bbb_usersessions_video', $bbb_usersessions_video, 'local_bbb');
        set_config('bbb_usersessions_audio', $bbb_usersessions_audio, 'local_bbb');

mod_lti_locallib.php

function lti_launch_tool($instance) {

    // Stop users from getting into a BBB session if server is overloaded.
    global $DB, $CFG;
    $ltitypes = $DB->get_record('lti_types', array('id' => $instance->typeid), '*', MUST_EXIST);
    if (strpos($ltitypes->name, 'BBB')) {
        $bbb_usersessions = get_config('local_bbb', 'bbb_usersessions');
        if ($bbb_usersessions > $CFG->bbb_usersessions_limit) {
            echo "BBB server is overloaded, please try again in a few minutes";
            return;
        }
    }

// ...