>>>>> "Shawn" == Shawn McKenzie writes:
Shawn> Shawn McKenzie wrote:
>> John Stoffel wrote:
>>> Hi,
>>>
>>> I'm looking for some help with PHP5.2.x hacking on a web site to
>>> cleanup how the user submitted search form is handled. Basically I
>>> want to make it simple for the end user to a) refine their query, b)
>>> not have to answer popups if they hit the reload button, and c) so I
>>> can learn more PHP. I found this nice reference:
>>>
>>> http://us2.php.net/manual/en/language.variables.external.php
>>>
>>> which has two sections by "wayne" and "Jonas Lindel" talking about how
>>> you can take the results of a PHP POST request, stuff the vars into
>>> your session, and redirect back to the same page without the POST vars
>>> set, then complete the query.
>>>
>>> The idea is so that when people hit the "back" or "reload" buttons,
>>> they don't keep getting asked whether they want to resubmit their
>>> data.
>>>
>>> What I'm trying is not strictly needed, but it would be a nice cleanup
>>> of the interface of the search forms for this site.
>>>
>>> I've been googling, reading php5.x docs and trying to understand what
>>> needs to be done here. I think I'm just missing how to re-assign
>>> $this properly, so that when the redirect happens, the proper env is set.
>>>
>>> Here's the snippet I'm trying to use, which bombs out with:
>>>
>>> Fatal error: Cannot re-assign $this in on line 45
>>>
>>> And the code I'm using is:
>>>
>>> >>
>>> // We want to put the search query into a session so we can restore it
>>> // easily when users goto look at full_holdings.php and then return to
>>> // the overall display page. We'll need to do a session_destroy in
>>> // index.php I think. See the tutorial(s) at
>>> // http://www.phpf1.com/tutorial/php-sessions.html
>>> // http://us3.php.net/manual/en/book.session.php
>>>
>>> session_start();
>>>
>>> // Now see Jonas Lindel's & Wayne's code at
>>> // http://us2.php.net/manual/en/language.variables.external.php for
>>> // this *nice* trick.
>>>
>>> //is there POST or GET data we should look at
>>> if($_POST or ($_GET and (!isset($_SESSION['skipnextget'] {
>>>
>>> //is there GET data?
>>> if($_GET) {
>>> $newgetarr = array();
>>> foreach($_GET as $key => $value) {
>>> if(is_array($value)) {
>>> //if it's an array, convert it to comma separated
>>> $newvalue = implode(',',$value);
>>> } else {
>>> $newvalue = $value;
>>> }
>>> $newgetarr[] = $key.'='.$newvalue;
>>> }
>>> $newget = implode('&',$newgetarr);
>>> $_SESSION['skipnextget'] = 1;
>>> }
>>> foreach($_POST as $key => $value) {
>>> $this[$key] = $value;
>>> }
>>> $_SESSION['postvars'] = serialize($this); //put POST in the session
>>> header("Location: http://"; .$_SERVER['HTTP_HOST']
>>> . $_SERVER['PHP_SELF'] . '?\
>>> ' . $newget);
>>> //reload page without POST data and shorter GET data
>>>
>>> exit();
>>> } else { //after reloading we'll come right to this spot
>>> session_unregister('skipnextget');
>>> if(isset($_SESSION['postvars'])) {
>>> //load the POST variables from the session
>>>
>>> // Error on this line below!
>>> $this = unserialize($_SESSION['postvars']);
>>> session_unregister('postvars'); //delete the session stuff we
>>> //don't need anymore.
>>> return $this;
>>> }
>>> }
>>>
>>> // rest of my code goes here...
>>> ___
>>>
>>> Thanks,
>>> John
>>> j...@stoffel.org
>>
>> I'm not sure if it is technically reserved, but $this is used in a class
>> in order for an object to refer to itself. AFAIK you can't use it
>> anywhere other than that. Just change all $this to $vars or something else.
>>
Shawn> Also, as you can see by the use of $this, this is old code.
Shawn> You need to change all of the session_unregister('varname')
Shawn>
