Php Sessoins N Cookies
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Session and cookies allow storing and retrieving data on the client-side. Sessions use a session ID to track user data across page requests. Cookies are stored in the browser and can persist longer than a session. The document provides examples of using sessions to track a counter and login information. It also demonstrates setting, retrieving, and deleting cookies to store form data between submissions.
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Php Sessoins N Cookies
- 4. <?php // initialize a session session_start (); ?> <html> <head></head> <body> <?php if (!isset( $_SESSION [ 'name' ]) && !isset( $_POST [ 'name' ])) { // if no data, print the form ?> <form action=" <?php echo $_SERVER [ 'PHP_SELF' ] ?> " method="post"> <input type="text" name="name"> <input type="submit" name="submit" value="Enter your name"> </form> <?php } else if (!isset( $_SESSION [ 'name' ]) && isset( $_POST [ 'name' ])) { // if a session does not exist but the form has been submitted // check to see if the form has all required values // create a new session if (!empty( $_POST [ 'name' ])) { $_SESSION [ 'name' ] = $_POST [ 'name' ]; $_SESSION [ 'start' ] = time (); echo "Welcome, " . $_POST [ 'name' ] . ". A new session has been activated for you. Click <a href=" . $_SERVER [ 'PHP_SELF' ] . ">here</a> to refresh the page." ; } else { echo "ERROR: Please enter your name!" ; } } else if (isset( $_SESSION [ 'name' ])) { // if a previous session exists // calculate elapsed time since session start and now echo "Welcome back, " . $_SESSION [ 'name' ] . ". This session was activated " . round (( time () - $_SESSION [ 'start' ]) / 60 ) . " minute(s) ago. Click <a href=" . $_SERVER [ 'PHP_SELF' ] . ">here</a> to refresh the page." ; } ?> </body> </html>