PHP cannot read a cookie set by JavaScript [duplicate]

PHP cannot read a cookie set by JavaScript. Although the. PHP file is in a separate folderript file, they are on the same domain. When I set the cookie in JavaScript, I use fetch to call the PHP file. However, when the call is made, PHP cannot see any cookies. I can see the script running successfully in the network console.

Javascript:

document.cookie = "name=value0;";

fetch("/path/to/file.php", {
      method: "POST",
      credentials: "same-origin",
      body: JSON.stringify({
        value1: value1,
        value2: value2
      }),
      headers: {
        "Content-Type": "application/json"
      },
    });

PHP:

var_dump($_COOKIE);

PHP response:

array(0) {
}