How can I carry cookies in php to multiple subdomain

Question

I want to carry some cookies value to different subdomains like

blog.mydomain.com , profile.mydomain.com , stats.mydomain.com, etc.

Right now I am using below code to set cookies

setcookie('var_name', 'var_value', null, "/", '.mydomain.com' );

With this code, cookies set on blog.mydomain.com available on mydomain.com but not on other subdomain (profile.mydomain.com , stats.mydomain.com, etc.)

Please, let me know, whats wrong with my code .

Answer 1

try:

$res = setcookie('var_name', 'var_value', null, "/", '.mydomain.com' );
var_dump($res); exit;

the output should be TRUE, if you see false it means output exists prior to calling this function and you can't set cookies after beginning sending content