How can the configuration of domain names impact the functionality of PHP sessions, and what steps can be taken to address this issue?

The configuration of domain names can impact PHP sessions if the domain changes between requests, causing the session data to be lost. To address this issue, set the session cookie domain to the root domain to ensure continuity across subdomains. 

<?php
session_set_cookie_params(0, '/', '.example.com');
session_start();
?>

Keywords

domain names PHP sessions configuration functionality steps

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