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session help

Discuss session help in the PHP Coding forum on Codewalkers.
session help Having problems with a PHP script you are coding? This is the place to get help!

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  #1  
Old August 28th, 2002, 04:22 PM
ResNet9 ResNet9 is offline
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session help
I'm making a survey for a site and the first page is a login page. The person has to enter in an id number and we check to make sure it is in our database. I just want to make sure that people cannot hotlink past that page and take the survey without using this id number. I am passing it from page to page in session variables but I'm kind of new with sessions. How do I require that the ID number was entered on the first page. Also can any see any other issues were people can skew results? Thanks
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  #2  
Old August 28th, 2002, 05:03 PM
Taoism Taoism is offline
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RE: session help
I have a multi-page wizard that I don't want people to jump into the middle of, so my solution was simple:

php Code:
Original - php Code 
  1.  
  2. <?php
  3. /**
  4. * function to check for the existence of required session variables.  It will redirect
  5. * to an error page if the session variables are not set
  6. * 
  7. * @author Keith Young <youngka@agr.gc.ca>
  8. * @since 08-Jul-2002
  9. * @version 1.0
  10. *
  11. * @global array $XFA exit fuseaction array used for redirect
  12. *
  13. */
  14. function sess_redirect(){
  15.   global $XFA;
  16.   
  17.   //this check will help to avoid DB errors being displayed if the user lets the session time out.
  18.   if(!isset($_SESSION['rt']['wizpage1']['prov'])||!isset($_SESSION['rt']['wizpage1']['claim_yr'])){
  19.     header('Location: index.php?fuseaction='.$XFA['sesserr']);
  20.   }  
  21. }//end sess_redirect()
  22. ?>


Hope it helps!

Cheers,
Keith.
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  #3  
Old August 28th, 2002, 05:36 PM
Anonymous Anonymous is offline
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RE: session help
hi taoism can u explain how that works?

what is all that rt, wizpage1, stuff beside SESSIONS? and how is there an array with sesser... that looks confusing ... how does it check every middle page the user goes to , to see if he's logged in?
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  #4  
Old August 28th, 2002, 05:49 PM
Taoism Taoism is offline
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RE: session help
Ahhh, well, I didn't write it for the poster... I wrote it for my application, so it reflects some of the array structure I store in the session variable.

To break it down in a simpler fashion...

The poster needs to check the $_SESSION variable for the existence of an id number... in order to prevent someone from jumping into page3.php instead of going to page1.php and entering a valid id you check for the variable in $_SESSION on every page past the first page...

So, to redo my function a touch....

php Code:
Original - php Code 
  1.  
  2. <?php
  3. /**
  4. * function to check for the existence of 
  5. * required a session variable.  
  6. * It will redirect to the survey id 
  7. * enter page if it isn't found.
  8. * 
  9. * @author Keith Young <youngka@agr.gc.ca>
  10. * @since 28-Aug-2002
  11. * @version 1.0
  12. *
  13. */
  14. function survey_redirect(){
  15.   
  16.   if(!isset($_SESSION['survey_id'])){
  17.     //use the err to display a message specifying they 
  18.     //need to enter a survey id before proceeding
  19.     header('Location: survey_enter_id_page.php?err=1');
  20.   }  
  21. }//end sess_redirect()
  22. ?>


better?

Sorry, I didn't think the first was so confusing, or I wouldn't have posted it like it is..

Cheers,
Keith.
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  #5  
Old August 28th, 2002, 05:59 PM
ResNet9 ResNet9 is offline
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RE: session help
Thanks. I'm now completely comfortable with the session stuff yet so your help was appreciated.
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  #6  
Old August 28th, 2002, 06:10 PM
ResNet9 ResNet9 is offline
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RE: session help
that was supposed to be "not completely comfortable" instead of "now completely comfortable." HAHA I might want to read want I wrote before I post it.
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