Provider
PHP / Magento / Drupal
See all PHP / Magento / Drupal cookies →PHP session-identifier cookie. Used by PHP-based platforms (Magento, Drupal, custom apps) to maintain user session state.
PHP / Magento / Drupal
See all PHP / Magento / Drupal cookies →Session
Site operator
PHPSESSID is classified as essential — strictly necessary for the site to function. Art. 5(3) ePrivacy carves these out: no consent required.
You should still mention it in your cookie policy / privacy notice so visitors can see what runs on your site.