pass php variables javascript window location

Question

I am trying to destroy all form sessions as follows: i have a sidenav.php bar, when the user clicks on it, it goes to this page:

<?php
session_start();
unset($_SESSION['applicationID']);
session_destroy();
echo'<html><script>window.location="index.php?url=newapplication&id="'.$userid.';</script></html>';
?>

which in turn bring up the new application form, however, the "$userid" fails to echo. it comes back as blank. any ideas?

it is actually declared in my index page. in my index page when the url==newapplication, it brings up the file to be included. — NULL, Jan 15 '15 at 16:38
What Jay says.. Also, you might want to take a look at how to do your redirection in PHP: http://stackoverflow.com/a/768472/3492835 — Sander Toonen, Jan 15 '15 at 16:38
Ok, clear. Does this script output anything to your console? ````echo '';```` — Sander Toonen, Jan 15 '15 at 16:41
If it is declared in your index page when are you including this? — Jay Blanchard, Jan 15 '15 at 16:42

score 1 · Answer 1 · answered Jan 15 '15 at 16:54

**$userid ** NEEDS (you have no option) to be defined BEFORE you can use it.

Whatever you have defined in your main script will stay there because that script has finished his execution time.

You can pass that value via either GET, POST, SESSION or COOKIE. Otherwise you will have to dig on your database for that username but then again, you need to "keep" a session or a number to "go back to" in order to search for it.

What you are actually trying to do could work as follows if you HAVE the userid variable defined in SESSION:

<?php
session_start();
unset($_SESSION['applicationID']);
echo'<html><script>window.location="index.php?url=newapplication&id='.$_SESSION['userid'].'"';
session_destroy();
echo '</script></html>';

?>

score 0 · Answer 2 · answered Jan 15 '15 at 16:40

You have closed window.location before $userid.The output of your above code will be

<html><script>window.location="index.php?url=newapplication&id="the_value_of_$userid;</script></html>

Use the code below

<?php
session_start();
unset($_SESSION['applicationID']);
session_destroy();
echo'<html><script>window.location="index.php?url=newapplication&id='.$userid.'";</script></html>';
?>

Hope this helps you

pass php variables javascript window location

2 Answers2