<?php
    /*
        Plugin Name:    Tinnitus Notifier
        Version:        1.0.0
        Author:         Adrian Preuß
    */

    class Tinnitus_Mails {
        function __construct() {
            define('CRON_NAME', 'tinnitus_cron_shedule');

            #if(!wp_next_scheduled(CRON_NAME)) {
                wp_unschedule_event(time(), CRON_NAME);
                wp_clear_scheduled_hook(CRON_NAME);
                wp_schedule_event(time() - 3600, 'daily', CRON_NAME);
            #}

            add_action(CRON_NAME,   array($this, 'shedule'));
        }

        function shedule() {
            header('Content-Type: text/plain; charset=UTF-8');
            $users = get_users();
            foreach($users AS $index => $user) {
                if(get_the_author_meta('email_training', $user->ID) == 1) {
                    $responder          = get_the_author_meta('email_responder', $user->ID);
                    $show               = false;
                    $payment_time       = get_user_meta($user->ID, 'time_payed', true);

                    if(isset($payment_time) && $payment_time != false) {
                        if(time() - $payment_time > 15778463){
                            $payment_time = -1;
                        }
                    }

                    if($payment_time > 0) {
                        print $responder;
                        print $user->display_name;
                        print $user->user_email;
                        print "\n";

                        // NOT Work!
                        #wp_mail($user->user_email, "test", "testststs");

                        // Working!
                        #mail($user->user_email, "test", "testststs");
                    }
                }
            }
        }
    }

    new Tinnitus_Mails();
?>