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HTML page sending form data to PHP page

My html page 'nameinfo' has this on it:

<body>
    <form action="name.php" method="post">
    First Name: <br>
    <input type="text" name="firstname"> <br>
    Last Name: <br>
    <input type="text" name="lastname"> <br> <br>
    <input type="submit" value="submit data">
    </form>
</body>

Now this data the user enters is supposed to send to a page called 'name.php'. When the page opens up all it shows is my php code. Why is this. Where should i put the name.php page?

create a page called name.php

 <?php
        $firstname = $_POST['firstname'];
        $lastname  = $_POST['lastname'];
        echo  $firstname;
    ?>

It will show the Firstname data...

put this in your name.php and it will display all the data containing in your POST method at name.php.

<?php
     echo "<pre>";
     print_r($_POST);
?>

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