Question

How to redirect in PHP without killing session

Asked by: MHenry

I'm trying to do a page redirect based on and if statement:
if ( ($data[1] < 60) || ($data[1] > 63))
{
   echo "<meta http-equiv=\"refresh\" content=\"0;URL=orderform.php\">";
   die();
}


The problem is, this is destroying the session. Is there a way to do a page redirect without ending the session?

Thanks,
MH

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Asked On
2009-07-29 at 17:22:38ID24611571
Topics

PHP Scripting Language

,

PHP and Databases

,

PHP for Windows

Participating Experts
2
Points
500
Comments
12

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Answers

 

by: kevin_uPosted on 2009-07-29 at 17:36:44ID: 24975861

As long as its in the same domain, and cookies are enabled, the session should not be killed.  If the session is being run through a session variable on the GET or POST instead of a cookie, then the session will be killed unles you pass the sessionid in the get or post.

Do you know what kind of session is being setup?

You can look here for alternative redirects that may work better for you... especially the first one: http://blog.codebeach.com/2008/02/php-redirect-tutorial.html

if ( ($data[1] < 60) || ($data[1] > 63))
{
   header("location: orderform.php");
   die();
}

 

by: MHenryPosted on 2009-07-29 at 18:00:51ID: 24975948

I'm not positive but it's either a Get or a Post. I'm doing a Mod on an ecommerce package and there's code everywhere. But I do see a lot of Get and Post sessions throughout.

I tried the other type of redirect but it throws:
"Cannot modify header information - headers already sent by ..."

I also tried  echo "<meta http-equiv=\"refresh\" content=\"0;URL=orderform.php . $_SESSION["CartId"] \">";
but that threw: Parse error: syntax error, unexpected '"', expecting T_STRING or T_VARIABLE or T_NUM_STRING

Although, it did have the right cartID in the URL. I just don't know if that's the right Session for all the data.

Best,
MH

 

by: kevin_uPosted on 2009-07-29 at 18:14:19ID: 24976004

The code that uses a header for the redirect must be before any other html code goes out of the php scrpt.

Here is the correct syntax for your alternative.  I don't know if that is the session indicator or not either.
echo "<meta http-equiv=\"refresh\" content=\"0;URL=orderform.php?CartId=$_SESSION['CartId']\">";

 

by: MHenryPosted on 2009-07-29 at 18:47:09ID: 24976115

That threw this:
Parse error: syntax error, unexpected T_ENCAPSED_AND_WHITESPACE, expecting T_STRING or T_VARIABLE or T_NUM_STRING

 

by: kevin_uPosted on 2009-07-29 at 18:49:17ID: 24976128

sorry.. this is better.

echo "<meta http-equiv=\"refresh\" content=\"0;URL=orderform.php?CartId=".$_SESSION['CartId']."\">";

 

by: MHenryPosted on 2009-07-29 at 19:35:09ID: 24976309

Well, that didn't throw an error, but it isn't the right session. or it's incomplete.

I don't even know where to look...

 

by: kevin_uPosted on 2009-07-29 at 20:46:57ID: 24976567

what is the name of the e-commerce system?

 

by: MHenryPosted on 2009-07-29 at 22:03:07ID: 24976844

cartweaver. It's not an opensource or anything. It's a plugin to Dreamweaver.

Does this give a clue as to how it should be formed?
<?php echo($cartweaver->thisPageName . "?cartid=" . $cartweaver->getCartId());?>

 

by: nanharbisonPosted on 2009-07-30 at 05:56:17ID: 24979188

If you go from a page that is https to http or vice versa, the session will be killed. I found this out because it happened to me and it DAYS to figure out this one stupid thing!

 

by: MHenryPosted on 2009-07-30 at 08:18:07ID: 24980681

Unfortunately, this is all under http, no https at this point...

 

by: kevin_uPosted on 2009-07-30 at 09:41:50ID: 24981685

That being the case, you should try this:

echo "<meta http-equiv=\"refresh\" content=\"0;URL=orderform.php?cartId=".$cartweaver->getCartId()."\">";

 

by: MHenryPosted on 2009-07-31 at 17:34:28ID: 31609546

Decided to go a different way but that answer helped me find the right one.

20120131-EE-VQP-002

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