vb.org Archive - Plugin / Hook not working?

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- vB3 General Discussions (https://vborg.vbsupport.ru/forumdisplay.php?f=111)

- - Plugin / Hook not working? (https://vborg.vbsupport.ru/showthread.php?t=103338)

Alan1

12-20-2005 12:46 AM

Plugin / Hook not working?

Hi,

I am not sure if this is the right forum -

I have activated the plugin/hook system on my bulletin board and have added a new plugin which hooks at the location - sendmessage_start.

In the plugin php code I have entered something very simple echo 'hello world';

Now when I go back to my forum and click on the contact us, in theory the words hello world should be at the top but instead I get a blank page??

If I turn off the plugin, the page displays like normal. If I replace the echo code with phpinfo(); then it displays the usual phpinfo information and then below it the contact us form.

So why is it not working for something simple like an echo command, did I forget to activate soomething else?

Paul M

12-20-2005 01:39 AM

Echo's are not always displayed;

Try

Code:

echo "Hello World" ; exit;

This will prove the plugin is working.

Alan1

12-20-2005 01:57 AM

Hi Paul,

That works.

In regards to your comment that echo's do not always display, if that is so shouldn't the rest of the output be displayed and not just a blank page?

If I view the source of the blank page, this is all I get..

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=Content-Type content="text/html; charset=iso-8859-1"></HEAD>
<BODY></BODY></HTML>

merk	12-20-2005 05:34 AM

That means there either is a PHP error in your code or no output is being sent. (the code you're seeing is a blank page generated by your browser)

Alan1

12-20-2005 08:36 PM

Quote:

Originally Posted by merk

That means there either is a PHP error in your code or no output is being sent. (the code you're seeing is a blank page generated by your browser)

If that is the case then can you please tell me what is wrong with?

echo 'hello world';

merk	12-20-2005 08:53 PM

output buffering will catch it. (and wont output it). You should NEVER directly output to the browser from a plugin anyway.

echo "hello world"; die;

joelabq

12-20-2005 09:01 PM

The echo will not work in the main script, unless you use a vbulletin function to error out.

For a postbit, for instance, you can set a var like
$post[my_var] == "Hello world"

then in your postbit template, find the spot you want hello world to appear and put $post[my_var] in that template.

Joel

Alan1

12-20-2005 09:26 PM

Ok that is fine with the echo bit then.

What I really want to do is change the logo header on the bulletin board (ie. replace the vBulletin logo etc.) with an include file but I have been told I can not do a call to an include <!--#include virtual ... in the style manager header area and I have instead been told to use the hook / plugin system.

Two questions -

1. For an include file do I just use the PHP include equivalent ie. include 'test.php';
2. The include file only contains HTML code, how do I get it to just display the HTML code in the include file.

merk	12-20-2005 11:17 PM

Short answer: www.php.net -> search for output buffering.

If your file is static, its easier to just modify the header template, than messing around with even more output buffering.

joelabq

12-21-2005 04:57 AM

Maybe we could help if we knew what you were trying to do?

joel

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