[RESOLVED] Help using regex

Tonyo

I have data driven url links like mydomain.com/mypage.php?kuanum=3003.
I need those links to point to pages / page positions external of my data driven pages resulting in mydomain.com/otherpage.html#3003.
I'm new to php and scouting around read up on regexes but need help in constructing one that can strip my url of '?kuanum=' and replace it with '#'.
My existing event code consists of objects but understand that regex only works on strings. I'm thinking 'Getvalue()' is my start point but how do we get my regex to parse this value and do its thing.
Any help appreciated.

Kind regards
Tony

bpat1434

To send values through the URL, you need to use ? that way the script knows there are GET variables.

Using # would insite that there's an anchor to look for.

You might be able to use $SERVER['QUERY_STRING'] and get the #XXX value. That regex would look like:

$string = $_SERVER['QUERY_STRING'];
preg_match("~#([0-9]*)~", $string, $matches);
var_dump($matches);

Tonyo

Thanks for the reply.
My values are derived from my product table so the resulting php leaves a link with a url and corresponding parameters.
I'm using Codecharge to generate my grid and need to have a Beforeshow event to parse the url link to take the whole of '?kuanum=' and replace it with '#' anchor to an external html page. This is why I was asking if a regex could replace those parameters with the required anchors.
I haven't had chance to test your example just yet but previous trials have produced an error along 'string to object conversion blah blah'. I guess I need to convert my object to a string first and then strip the url before output.
I'll post back my findings when I have them.

bpat1434

Oh!!! Oh!!!! Wait!!!! I have something better!!!

Use a .htaccess file (Apache) to do it!!!! HAHAHA!!! It'd be a few lines, and the mod_rewrite would have to be available (which most hosts have turned on). It would look something like:

Options +FollowSymLinks
RewriteEngine On
RewriteRule ^?kuanum=(.*) http://www.domain.com/external/page.html#$1

It may take some tweaking, but that's the general idea...

Tonyo

OK I tried your htaccess method but without success.
It generates a 500 server error.
My error log throws up "RewriteRule: cannot compile regular expression '^{?kua_num=(.*)'} "
If I escape the'?' the error disappears but does not give the result I require.
By the way I am using Plesk 7 here and beleive there may be issues with mod_rewrite as I had to enable this in my vhost.conf. Should I put the whole of my Rewriterule here instead of .htaccess.
Any thoughts appreciated.

kind regards Tony

bpat1434

Woops... that was my bad... ? is an operator for regex...

RewriteEngine On
RewriteRule ^\?kua_num=(.*) http://www.domain.com/page.html#$1

Now, if you don't get the result you want, what do the server logs say?

Plesk 7 has no bearing on how Apache works. As long as the module is enabled, you'll be fine. This code belongs in the .htaccess file, no-where else.

Tonyo

This never worked for me and the error log does not report an error, only when I lose the escape char from '?'.
Not wanting to be beaten by this I researched the use of regex in htaccess.
If I'm not mistaken, rewriterule may not be the correct method for the result I require. As I understand it, your example will only match an actual url, one that exists and rewrite it to the browser with one that doesn't.
Can we rethink this one based on my layout below.

URL Tree
www.mydomain.com
index.html
[INDENT]Folder1[/INDENT]
linkpage1.html
[INDENT] Folder2[/INDENT]
linkedpage2.php

My clickable link on linkedpage2.php looks like
http://www.mydomain.com/Folder1/linkpage1.html?kua_num=3003
This should land me at http://www.mydomain.com/Folder1/linkpage1.html#a3003

Can we expand your example in some way so that I can get the desired result.
Appreciate your help here.

kind regards.

bpat1434

Options +Indexes +FollowSymLinks
RewriteEngine On
RewriteRule ^[url]http://(.*)/(.*)/(.*)\.html\?kua_num=(.*[/url]) http://$1/$1/$3\.html#a$4

That should get you somewhere close....

Of course, you could read up on Apache's use of regex in their documentation as they have variables that you could use in place of that...

Tonyo

Just to say thanks for all your input and suggestions here.
After reading up on this at apache.org I decided to invest in book on mod_rewrite.
Hope to get a better understanding on this.
Just for completeness I include my final code here.

rewritecond %{QUERY_STRING} kua_num=(.+) [nc]
rewriterule ^(.*)$ http://www.mydomain.com/acatalog/$1#a%1? [r,nc,ne]

It works for me and may prompt other users to rethink there present issues.