Why are cookies present in the browser but not displayed on the site?

Question

PHP

In general, I save cookies (for registration), they are transmitted to the browser, i.e. when viewed in the settings, they are there, but when I try to display them on the site, it says that the $_COOKIE array is empty, only the session.
Recording:

setcookie("rememberEmail", $email, time()+60*60*24);

Answer 1

All, thank you all, I solved the problem by adding 4 parameter setcookie path "/"

Answer 2

https://www.owasp.org/index.php/HttpOnly
Is it?

Answer 3

How do you bring them to the site? And what about error output?
Code for using your COOKIE:
Display the entire array of COOKIES:
print_t($_COOKIE);