setcookie（）不工作，数组总是空的

Question

不确定我做错了什么......

以下是用于设置Cookie的页面： https://www.ni-dieu-ni-maitre.com/test.php

    $domain = "ni-dieu-ni-maitre.com";
$articleid = "test";

$lastviewedarticles = array();

if (isset($_COOKIE["viewed_articles"]) ) {
  $lastviewedarticles = unserialize($_COOKIE["viewed_articles"]);
}

if (!in_array($articleid, $lastviewedarticles)){
    $count = count($lastviewedarticles);
    if($count>=29)
        array_shift($lastviewedarticles);
    $lastviewedarticles[] = $articleid;
}
setcookie('viewed_articles', serialize($lastviewedarticles), time()+60*60*24*30, '/', '.' . $domain);

然后此页面读取cookie并输出内容： https://ni-dieu-ni-maitre.com/test2.php

if ( isset($_COOKIE["viewed_articles"]) ) {
  $lastviewedarticles = unserialize($_COOKIE["viewed_articles"]);
}
echo "cookie is currently:<br>";
print_r($lastviewedarticles);

正如您在测试页面上看到的那样，没有WWW，cookie总是空的。 Cookie中有一个数组，但它总是空的