Why does location.reload remove cookies?

Question

PHP

When reloading the page using the JS method: location.reload(false), cookies are deleted.
Here is my php code:

<?php
require_once("php/lib/streams.php");
require_once("php/lib/gettext.php");
$setup_lang = locale_accept_from_http($_SERVER['HTTP_ACCEPT_LANGUAGE']);
// $selected_lang = array("pl_PL","en_US");
// $locale_lang = in_array($locale_lang, $selected_lang) ?  $locale_lang : "en_US";
if(isset($_POST['lang'])){
    $locale_lang = $_POST['lang'];
    setcookie("your_lang", $locale_lang, time() + (86400 * 3), "/");
     $locale_file = new FileReader("php/locale/" . $_COOKIE["your_lang"] . "/LC_MESSAGES/messages.mo");
}
else if(!isset($_COOKIE["your_lang"]))
{
    $locale_file = new FileReader("php/locale/" . $setup_lang . "/LC_MESSAGES/messages.mo");
}else{
    $locale_file = new FileReader("php/locale/" . $_COOKIE["your_lang"] . "/LC_MESSAGES/messages.mo");
}



$locale_fetch = new gettext_reader($locale_file);

function __($text){
  global $locale_fetch;
  return $locale_fetch->translate($text);
}

 ?>

Answer 1

Are you sure it's the cookies? Are you deleting cookies, or is the language set not what you expect from cookies?