What potential pitfalls should I be aware of when trying to transfer a session to a subdomain in PHP?

When transferring a session to a subdomain in PHP, one potential pitfall to be aware of is the possibility of session cookie domain mismatch. This can occur if the session cookie domain is not properly set to the subdomain, leading to session data not being accessible. To solve this issue, you can explicitly set the session cookie domain to the subdomain using the session_set_cookie_params() function before starting the session. 

// Set session cookie domain to subdomain
session_set_cookie_params(0, '/', '.subdomain.example.com');
session_start();

Keywords

session subdomain cookie domain security

Related Questions