setcookie in PHP works only on localhost

Question

I've developed a web app, using cookie. If I set a cookie in localhost with php it works, but if I move the project to a domain (app.segresta.it) cookie stop working. I have done a couple of test and I discovered that if I use javascript, cookie are precisely setted.

setcookie("user", id_user);

Localhost are Linux Ubuntu 15.10. Domain is Linux.

Answer 1

You need to use the following syntax:

setcookie("TestCookie", $value, time()+3600, "example.com");

where "example.com" is your domain name or just "/" instead of domain name. It works for me by this way.