PHP JWT Token
What is JWT?
JWT stands for JSON Web Token.
It is a secure way to send user information between client and server using a token.
JWT is mostly used for:
• User Login Authentication
• API Security
• Mobile App Authentication
• Single Sign-On (SSO)
• Secure Data Exchange
Real-Life Example
When you log in to:
• Google
• Facebook
• Instagram
the server generates a token after successful login.
That token is stored in:
• Browser local storage
• Session storage
• Cookie
• Mobile app storage
Whenever you open another page or call an API, the token is sent automatically.
The server checks the token and allows access.
Why JWT is Important
Without JWT:
• User must login again and again
• Server must store session data
• APIs become difficult to manage