Cookies + PHP：欢迎留言

Question

我希望您早安，午后，晚安或晚安在网站上打招呼+如果您已经访问过网站，您将收到欢迎的问候，但没有任何帮助。我只收到“晚安”，“下午好”，“晚安”的“晚安”消息，但从未收到“早上好，欢迎回来”，“下午好，韦尔科姆回来”，“晚上好，欢迎回来”的消息。或“晚安，欢迎回来”消息。

    <?php
    $time = date("H");
    $timezone = date("e");
    if(isset($_COOKIE['visit']) && ($_COOKIE['visit'] == "true")){ 
    if($time < "12"){
    $message = "Good morning, welcome back!";
    echo $message;
    }else if($time >= "12" && $time < "17"){
    $message = "Good afternoon, welcome back!";
    echo $message;
    }else if($time >= "17" && $time < "19"){
    $message = "Good evening, welcome back!";
    echo $message;
    }else if($time >= "19"){
    $message = "Good night, welcome back!";
    echo $message;
    }
    }else{ 
    if($time < "12") {
    $message = "Good morning!";
    echo $message;
    }else if($time >= "12" && $time < "17") {
    $message = "Good afternoon!";
    echo $message;
    }else if($time >= "17" && $time < "19") {
    $message = "Good evening!!";
    echo $message;
    }else if($time >= "19") {
    $message = "Good night!!";
    echo $message;
    }
    setcookie("visit", "true", time()+60*60*24*600);
    } 
    ?>