PHP authentication

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Login

  • Store hash of password in database
  • Check password by fetching row based on username, then use password_verify (which is safe against timing attacks)
  • After a successful verification, call password_needs_rehash to see if the hash needs to be updated

Session cookies

Whether you use the built-in functionality or setcookie, you need to ensure that:

  • Sessions are only sent in cookies, not URL parameters (session.use_cookies = 1)
  • Only send session cookies for HTTP requests (session.cookie_httponly = 1 or $options['httponly'] = true)
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