how to remember input data in the forms even after refresh page?

Question

what to do in order to make the form remember the previous input or the current input of the user even after he/she refreshed the page ?

should I do ,

            <div class="row">
             <label>Contact Messenger </label>
             <input type="text" name="messenger" id="messenger" size="50" maxlength="50" value="<?php echo $_SESSION['messenger']; ?>"/>
            </div>

or

            <div class="row">
             <label>Contact Messenger </label>
             <input type="text" name="messenger" id="messenger" size="50" maxlength="50" value="<?php echo $_POST['messenger']; ?>"/>
            </div>

or

there's a trick to do it ?..how ?

Answer 1

on the page where your form is submitting do something like this

    session_start();
    $_SESSION['data'] = $_POST['data'];
    $_SESSION['data_another'] = $_POST['data_another'];

and than you can access those session variables any where like this

    session_start(); // this should be at the top of the page before any html load
    <input type="text" name="name" value="<?php echo $_SESSION['data'];?>"/>

refresh your page on success call like this

     $.ajax({
           type: "POST",
           url: "yourfile.php",
           data: 'data='+ data,
           success: function(){
               location.reload();
           }
       });