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Php-intermediate-level-interview-questions--->View question


Asked On2019-06-18 12:03:29 by:RSHAH12

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COOKIE:
             A cookie is a small file with the maximum size of 4KB that the web server stores on the client computer.

Once a cookie has been set, all page requests that follow return the cookie name and value.

Session:

  • A session is a global variable stored on the server.
  • Each session is assigned a unique id which is used to retrieve stored values.
  • Whenever a session is created, a cookie containing the unique session id is stored on the user’s computer and returned with every request to the server.  If the client browser does not support cookies, the unique php session id is displayed in the URL
  • Creating Cookies

    <?php
    
    setcookie(cookie_name, cookie_value, [expiry_time], [cookie_path], [domain], [secure], [httponly]);
    
    ?>
  • Creating a Session

    In order to  create a session, you must first call the PHP session_start function and then store your values in the $_SESSION array variable.

     Let’s suppose we want to know the number of times that a page has been loaded, we can use a session to do that.

    The code below shows how to create and retrieve values from sessions

    <?php
    
    session_start(); //start the PHP_session function 
    
    if(isset($_SESSION['page_count']))
    {
         $_SESSION['page_count'] += 1;
    }
    else
    {
         $_SESSION['page_count'] = 1;
    }
     echo 'You are visitor number ' . $_SESSION['page_count'];
    
    ?>



Answerd on:2019-06-20 Answerd By:gokilapriya

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