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Views: 3010 | Replies: 6 | Solved
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Join Date: Sep 2004
Posts: 13
Reputation: 
Rep Power: 5
Solved Threads: 0
Newbie Poster
Help with querystring error.
I am try to pass a query string to the same page but having problem
This is my code:
<HTML><BODY>
<div align=center>
<A href="?page=1">Page 1</A> -
<A href="?page=2">Page 2</A> -
<A href="?page=3">Page 3</A>
</div><hr>
<? switch($page) {
case "1" :?>
THis is page one
<? break; case "2" :?>
This is page two
<? break; case "3" :?>
This is page three
<? break; default:?>
This is the default page
?}
?>
</BODY></HTML>
Why am I having the following error:
Notice: Undefined variable: page in c:\inetpub\wwwroot\ex1\qstring.php on line 7
I appreciate any help
thanks
tip
I am try to pass a query string to the same page but having problem
This is my code:
<HTML><BODY>
<div align=center>
<A href="?page=1">Page 1</A> -
<A href="?page=2">Page 2</A> -
<A href="?page=3">Page 3</A>
</div><hr>
<? switch($page) {
case "1" :?>
THis is page one
<? break; case "2" :?>
This is page two
<? break; case "3" :?>
This is page three
<? break; default:?>
This is the default page
?}
?>
</BODY></HTML>
Why am I having the following error:
Notice: Undefined variable: page in c:\inetpub\wwwroot\ex1\qstring.php on line 7
I appreciate any help
thanks
tip
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Join Date: Jul 2004
Posts: 218
Reputation:
Rep Power: 5
Solved Threads: 4
Posting Whiz in Training
[PHP]<HTML><BODY>
<div align=center>
<A href="">Page 1</A> -
<A href="">Page 2</A> -
<A href="">Page 3</A>
</div><hr>
<? switch($page) {
case "1" :?>
THis is page one
<? break; case "2" :?>
This is page two
<? break; case "3" :?>
This is page three
<? break; default:?>
This is the default page
<? } ?>
</BODY></HTML>[/PHP]
You forgot to put "<" at this "<? } ?>"
<div align=center>
<A href="">Page 1</A> -
<A href="">Page 2</A> -
<A href="">Page 3</A>
</div><hr>
<? switch($page) {
case "1" :?>
THis is page one
<? break; case "2" :?>
This is page two
<? break; case "3" :?>
This is page three
<? break; default:?>
This is the default page
<? } ?>
</BODY></HTML>[/PHP]
You forgot to put "<" at this "<? } ?>"
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Join Date: Feb 2003
Location: London, England
Posts: 281
Reputation:
Rep Power: 7
Solved Threads: 6
Supreme Evil Overlord
That is not the problem, at least with regard to the error specified. The problem is that you think that by visiting mysite.php?page=2, the variable $page will be set to 2. In the majority of circumstances (default since PHP 4.0.2, I believe), this (fortuantely, from the side of security) is false.
If you want to retrieve the variable page from your URL string, you need to access it with $_GET['page']. So, while PoA is correct in noticing the missing <?php } ?> towards the end of your script, you also need to change [php]switch( $page ) {[/php] to [php]switch( $_GET['page'] ) {[/php]
(Although, it's odd that the script should run at all - as it is apparently doing to produce a notice rather than a parse error - if there was a missing closing brace.)
If you want to retrieve the variable page from your URL string, you need to access it with $_GET['page']. So, while PoA is correct in noticing the missing <?php } ?> towards the end of your script, you also need to change [php]switch( $page ) {[/php] to [php]switch( $_GET['page'] ) {[/php]
(Although, it's odd that the script should run at all - as it is apparently doing to produce a notice rather than a parse error - if there was a missing closing brace.)
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Join Date: Sep 2004
Posts: 13
Reputation:
Rep Power: 5
Solved Threads: 0
Newbie Poster
Thank you very much Roberdin and poA for your help. Now I can proceed
tip
tip
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Join Date: Sep 2004
Location: in the j00-kay
Posts: 114
Reputation:
Rep Power: 5
Solved Threads: 5
Junior Poster
should really have a break after the default: and before }
and no real need to use _GET with $page cos switch works on gets anyways :x
and no real need to use _GET with $page cos switch works on gets anyways :x
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Join Date: Feb 2003
Location: London, England
Posts: 281
Reputation:
Rep Power: 7
Solved Threads: 6
Supreme Evil Overlord
Sorry, what? I'm not quite sure what you mean there.
Unless your PHP.ini file has been explicitly modified to do this (register_globals = on), $_GET['page'] will NOT be the same as $page. $_GET is an array, containing the URI-passed values.
So, if you visit blah.php?foo=bar&bob=42
Then $_GET['foo'] will equal 'bar', and $_GET['bob'] will equal 42. $foo and $bob will be undefined; as $page was in Tip's original code.
Unless your PHP.ini file has been explicitly modified to do this (register_globals = on), $_GET['page'] will NOT be the same as $page. $_GET is an array, containing the URI-passed values.
So, if you visit blah.php?foo=bar&bob=42
Then $_GET['foo'] will equal 'bar', and $_GET['bob'] will equal 42. $foo and $bob will be undefined; as $page was in Tip's original code.
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