The SameSite attribute is used in cookies to control how they are sent in cross-origin requests. It provides a way for websites to declare whether cookies should be restricted to the same site or same-site origin.
The SameSite cookie can have three possible values:
- Strict
- Lax
- None
The use of the SameSite attribute helps mitigate certain types of cross-site request forgery (CSRF) attacks by preventing cookies from being sent in cross-origin requests. It provides developers with more control over how cookies are handled and helps protect user privacy.
To set SameSite cookie in xampp server follow below steps
Step 1: Open Xampp control panel and click Apache(httpd.conf)

Step 2: Add Below line and restart apache server
For Apache >= 2.2.4
Header edit Set-Cookie ^(.*)$ $1;SameSite=Strict
For Apache < 2.2.4
Header set Set-Cookie SameSite=Strict

To check the SameSite status of a cookie in Chrome, you can follow these steps:
1 . Launch the Google Chrome browser on your computer.
2. Right-click anywhere on the webpage and select “Inspect” from the context menu. Alternatively, you can press Ctrl+Shift+I
3. In the Developer Tools panel, you’ll see several tabs at the top. Click on the “Application” tab.
4. In the left-hand sidebar of the Application tab, you’ll find a list of categories. Locate and expand the “Storage” section.
5. Under the Storage section, click on “Cookies” and select website

Also read this
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- How to disable HTTP TRACE/TRACK (TraceEnable) methods in xmpp APACHE
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- Turn of Server Signature in xampp apache ?
- How to configure Proxy server In xampp Apache
- How to set SameSite cookie in xampp apache server ?
- How to set a cookie with the http only & secure flag in PHP?