NYCPHP Meetup

[Phil Powell]

Will the previous page have any form elements? If so, within a form within pageA.php you can have this:

<input type=hidden name=refURL value=<?= $PHP_SELF ?>>

Calling this form variable in pageB.php would ensure that they came from pageA.php

You can also do this in a query string, however, a better solution would be some kind of unique key, such as

pageB.php?var1=blah&var2=foo&...&uniqueKey=ICameFromPageA.php&...

That way you look for some unique string that could only have come from pageA.php.

HTH

Phil
  ----- Original Message ----- 
  From: betenoir at echonyc.com 
  To: itp-alumni at forums.nyu.edu ; talk at lists.nyphp.org 
  Sent: Monday, July 14, 2003 4:45 PM
  Subject: [nycphp-talk] $_SERVER['REQUEST_METHOD'] and Javascript historyobject


  I'm trying to determine whether the user is coming to a given page (call it pageB.php) from the previous page in the sequence (pageA.php) or off-site. 

  While I can access window.history.length, i cannot access a given key in that array:

  "Error: uncaught exception: Permission denied to get property History.previous" 

  or 

  "Error: uncaught exception: Permission denied to call method History.item"

  FWIW I'm using php and while I can determine the $_SERVER['REQUEST_METHOD'] this technique is not infallible. Apparently when you hit "back" (or select from the "Go" menu) some browsers use the cached version of page -- which means they return pageA.php and not pageX.html

  Aaaaarrrrgggghhhh!!!!!

  Suggestions?

  Clyde 


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