Cookie Library · Essential
PHPSESSID
Identifies your session on the server. Clearing it usually signs you out and empties a basket.
- Owner
- The site itself
- Matches
- The exact name
PHPSESSID - Needed to Work
- Yes. Removing it can sign you out or break the site.
- Confidence
- Verified
- Source
- https://www.php.net/manual/en/session.security.ini.php
- Last Reviewed
- 2026-09-13
Which Sites
Any site. The name is specific enough to identify this cookie wherever it appears.