POST multiple session variables with form, output on subsequent pages

Question

I've been through 20 or so different posts and I can't seem to get this right piecing together questions and answers for different aspects of what I'm trying to accomplish.

I have a form the user can fill out. I want that upon submitting the form, the choices made will be used as variables throughout the rest of the website.

My code:

<form action="page1" method="POST">
  <input type="text" name="var_1">
  <input type="text" name="var_2">
  <input type="submit" value="Submit" class="submit" name="submit">
</form>


<?php

session_start();

 if (isset($_POST['submit'])) {

   $_SESSION['var_1'] = $_POST['var_1'];
   $_SESSION['var_2'] = $_POST['var_2'];

 }
?>

<?php

session_start();

$var_1 = $_SESSION['var_1'];
$var_2 = $_SESSION['var_2'];

?>

<?php echo $var_1';?>
<?php echo $var_2';?>

This results in blank echos and a repeated error for each variable at the top of the page:

Notice: Undefined index: var_1 in page1.php on line #

Obviously my sessions aren't making it the second page, but I don't know why or what I've done wrong. This has been pieced together from posts about adding multiple sessions, posting sessions, getting sessions.

Well, it's page1.php technically but I'm handling that with .htaccess - I don't like .php urls. — Faye
– Faye, Commented Feb 12, 2017 at 4:11

affaz · Accepted Answer · 2017-02-12 04:23:16Z

3

Either Remove the action from your <form> and give the redirect to page1 in the PHP code because the PHP code below wont work and get redirected to the next page.As a result of which the session will not be set

    <form action="" method="POST">
      <input type="text" name="var_1">
      <input type="text" name="var_2">
      <input type="submit" value="Submit" class="submit" name="submit">
    </form>
    <?php

 session_start();

 if (isset($_POST['submit'])) {

   $_SESSION['var_1'] = $_POST['var_1'];
   $_SESSION['var_2'] = $_POST['var_2'];
   //redirect
   header("Location: page1.php");
 }
?>

Or set the session in the next page without the code below

<form action="page1" method="POST">
  <input type="text" name="var_1">
  <input type="text" name="var_2">
  <input type="submit" value="Submit" class="submit" name="submit">
</form>

page1.php

<?php

session_start();
$_SESSION['var_1'] = $_POST['var_1'];
$_SESSION['var_2'] = $_POST['var_2'];
$var_1 = $_SESSION['var_1'];
$var_2 = $_SESSION['var_2'];

?>

<?php echo $var_1;?>
<?php echo $var_2;?>

edited Feb 12, 2017 at 4:23

answered Feb 12, 2017 at 4:10

affaz

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2 Comments

Faye Over a year ago

My action IS wrecking it! Thanks! Question tho - how do I redirect them to page1 after the submit then? (php novice)

affaz Over a year ago

@REactionFaye Welcome :)

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