What is cookie?

• A cookie is often used to identify a user.
• A cookie is a small file that the server embeds on the user’s computer.
• Each time the same computer request a page with a browser , it will send the cookie too.
  
  

  How to use a cookie

  
  Here,  Set a cookie.
  Program:-
  <?
  $time=time();
  echo $time;
  //setcookie(name , value , expire)
  setcookie(‘student’ , ‘mark’ , ‘$time’)
  ?>
  
  OUTPUT:-
  1407535797
  

  ---

  <?
  $student=$_COOKIE [ ‘student’ ];
  echo $student;
  ?>
  
  OUTPUT:-
  mark