I have a problems with receiving data from forms on the website. i mean, after successfuly registration user have to see string like this: Hello "name", but instead of this i receive all strings, but every string have to be special for every new user. How can i do this with session? Help. Thanks.

The header function is used to redirect.

<?php header('Location: thispage.php'); ?>

Include this line in the page from which you want to redirect to thispage.php.

Or in case If you have the URL in some variable so write like this

<?php header('Location: '.$URL); ?>

Warning!!

Do not add unnecessary NewLine on the top of the page, or the header function will not work and return header have already been sent.

This is a good method to perform a redirection that works in all situations:

// $url contains the page to which you want to redirect the user

function redirect($url)
{
    if (!headers_sent())
        header('Location: '.$url);
    else
    {  
        echo '<script type="text/javascript">';
        echo 'window.location.href="'.$url.'";';
        echo '</script>';
        echo '<noscript>';
        echo '<meta http-equiv="refresh" content="0;url='.$url.'"/>';
        echo '</noscript>';
    }

    exit();
}

Use it once the user registration is completed:

redirect('successfull_registration.php');