CMS-CSE/core/controllers/header.php

<?php
    setlocale(LC_TIME, 'fr_FR');
    date_default_timezone_set(TIME_ZONE);

    require DIR_PHP_LIBS.'PHPMailer/Exception.php';
    require DIR_PHP_LIBS.'PHPMailer/PHPMailer.php';
    require DIR_PHP_LIBS.'PHPMailer/SMTP.php';

    use PHPMailer\PHPMailer\PHPMailer;
    use PHPMailer\PHPMailer\Exception;
    
    spl_autoload_register(function ($class_name) {
        (file_exists(DIR_PHP_CLASS.'/'.$class_name.'.class.php'))?	
        require_once DIR_PHP_CLASS.'/'.$class_name.'.class.php' : '';
    });

    if(core::isDebug()){
        error_reporting(E_ALL);
        ini_set("display_errors", 1);
        debug::startTimer();
    }

    if(core::isMaintenance() AND $_SERVER['HTTP_HOST'] != DOMAIN_CMS){
        get::page("maintenance");
        exit();
    }