PHP forum help

Jameson

I'm trying to add custom code to a PHP forum. It seems easy enough but for some reason I can't get it to work. The basic idea is that whenever the tags [tex] and [/tex] appear, I want to take whatevery was put between them and make an image like this:

<img src="mysite.com/cgi-bin/mimetex.cgi? the text in between the boxes">

Here's an example of what some of the packaged code looks like:

$bbcode_tpl['code_open'] = str_replace('{L_CODE}', $lang['Code'], $bbcode_tpl['code_open']);

That's to include code, just like this forum actually.

I don't know if anyones really familiar with PHP forums, but I have been working on this for a looonnnggg time and I really need someone's help.

Jameson

drew010

this will work, you just have to figure out how to integrate it into the forum software...

$text = '[tex]user text goes here[/tex] this is a test';

$text = preg_replace('/\[tex\](.*?)\[\/tex\]/ie',
                     "'<img src=\"/cgi-bin/mimetex.cgi?'.urlencode('$1').'\" />'",
                     $text);

echo $text; //<img src="/cgi-bin/mimetex.cgi?user+text+goes+here" /> this is a test

Jameson

Thanks a bunch!

You script makes sense except for this part:

$text = '[tex]user text goes here[/tex] this is a test';

What's that for?

Have you used phpBB before?

Thanks again!!
Jameson

drew010

it just represents sample text that would be their post. it just demonstrates the code works.
the third parameter of preg_replace should be the contents of the persons post.
as for phpBB, i dont like it too much, so i try to avoid it.

Jameson

The rest of the special codes like this are placed in a file called BBcode.php, so I'll try that. Thanks again!

What forum do you like?

drew010

i tend to use simple machines when I need a free forum (www.simplemachines.org) or vBulletin (which phpbuilder uses), but vbulletin is 180$ last time i checked.
the reasons are partly because of the user side, but mostly administration related.

Jameson

I copied the code into that file I said and got this error, well multiple errors.

Warning: Cannot modify header information - headers already sent by (output started at /home/themath/public_html/phpBB2/includes/bbcode.php:27) in /home/themath/public_html/phpBB2/includes/page_header.php on line 478

Any ideas?

drew010

looks like something is being output where it shouldnt be. headers must be sent before anything else is sent to the browser, and that was somehow changed, on line 27 in bbcode.php

Jameson

In this file all I see are huge functions... like maybe 100 line ones. Hmmm... I don't really know where to put your code.

Jameson

Ok... so here's an example of another function in there.

// [i] and [/i] for italicizing text.
	$text = preg_replace("#\[i\](.*?)\[/i\]#si", "[i:$uid]\\1[/i:$uid]", $text);

That's or italicizing... so should I insert your code without the "echo" part?

drew010

yes the potentially hard part is now to find exactly where they do all the transformations to the posts, and then to integrate the code I gave you with theirs.
Its possible it doesnt actually do it until they are displaying the message (as opposed to processing it before putting it in the db)

and correct, mine should have the echo part removed, as well as the $text = ... part.
from my example $text should be replaced with whatever variable they use to hold the contents of the post

Jameson

So just this?

$text = preg_replace('/\[tex\](.*?)\[\/tex\]/ie',
                     "'<img src=\"/cgi-bin/mimetex.cgi?'.urlencode('$1').'\" />'",
                     $text);

drew010

yeah thatll be the only thing you want to add

Jameson

And the cgi-bin isn't in the root directory of the forum... it's one level up. So whould I just type in the whole URL instead?

drew010

the path in my example assumes cgi-bin is located at http://yoursite.com/cgi-bin/ so you should make any changes as needed.

Jameson

It works perfectly!! Thank you so much!!

drew010

cool, glad you got it working. in case anyone stumbles upon this thread in the future, what file and lines did you have to add the code to in order to get it to work?

Jameson

You add the code in the file "bbcode.php" and insert it anywhere where all of the functions are being declared. I'll come back with a line number later. Question - when someone types spaces inbetween the code, a random + sign appears. What could I do to fix this?