问PHP站点在XAMPP中运行良好，但在linux上重定向次数太多

EN

<?php
require_once('model/user.php');
session_start();
$view = new stdClass();
$view->pageTitle = 'Login';
$user = new User();
$user->checkCookie();
if(isset($_POST['submit'])) {
    if(!isset($_POST['username'])) {
        // no username error
    } else if(!isset($_POST['password'])) {
        // no password error
    } else {
        $user = new User();
        if(isset($_POST['remember'])) {
           if($user->login($_POST['username'], $_POST['password'], $_POST['remember']) == TRUE) {
                header('Location: /cliserv/search.php');
            }
        } else {
            if($user->login($_POST['username'], $_POST['password'], FALSE) == TRUE) {
                header('Location: /cliserv/search.php');
            }
        }
    }
}
if(isset($_SESSION['loggedIn'])) {
    header('Location: /cliserv/search.php');
} else {
    require_once('view/login.php');
}

if (!class_exists('Campsite')) {
    require_once('campsite.php');
}
if (!class_exists('DB')) {
    require_once('database.php');
}
if (!class_exists('SearchData')) {
    require_once('searchData.php');
}