Variable scope for a plugin...

[mdevour]

Originally Posted by MarcoH64

PHP Code:

<?php
global $something;

foreach ($vbulletin->forumcache as $forumdata)
    {
    if ( strpos($forumdata["description"], '<!-- something -->') !== false )
        {
        $something[] = $forumdata["forumid"];
        }

This will make the variable $something that is in the namespace of the calling script (ie. outside the function) accessible within the function.

This is what I understood about scope in PHP, so far.

If the variable has not been defined/used yet it will be created implicit on the first use. If you now set $something to a value in your function, it will be accessible outside the function.

That is new to me. I did not realize that a function can create a variable and assign it scope outside of itself, if that's what you're saying. It's not something they emphasize in any of the documentation I've read.

Also, that raises a question about the plugin system. I was thinking that the my_mod.php file was being included, but it must be being executed within a call to the fetch_hook function. If the $global pushes the variable scope up to the calling context, then it makes sense. Do I have that right?

For adding new options to a Forum, see: https://vborg.vbsupport.ru/showthread.php?t=93445

Am I reading that right, it is all done with plugins? No code hacks? I'm still allowed to talk to vbulletin.com??? :nervous:

That looks like exactly what I'm trying to do, Marco. Bless you!

I'll try the $global statement and get it working my way. Then I'll go back and do it the right way. I don't mind finding out better ways to do what I've already done. The learning doesn't go away when I delete the dumb code!

Thank you for the help.

Be well,

Mike D.