Escaping BBtags

[russy]

I'm making a script that uses BBtags. I'll do my best to explain my problem.

 

Lets say we have a user named: bob[hi]yay\

 

If you have that username, in a lot of forums it tends to cause a problem, such as:

yay\]test

 

Basically I want to have it so you can escape the [ ] and \ characters, and regular expression will pick up on whats escaped and whats not. I have a basic understanding of regular expressions, and heres my older code that ignores escaping characters:

 

$parse['data'] = preg_replace("{\[{$bbtag['tag']}=(.+?)\](.+?)\[/{$bbtag['tag']}\]}sei", "\$this->bbtag({$bbtag['id']}, '\\2', '\\1')", $parse['data']);

 

The thing is it has to ignore a \], however NOT ignore a \\] which is the problem for me. Any help would be great, thank you.

[effigy]

- Why are brackets valid in the first place?

- Are you saying that "bob[hi]yay\" is going to be inserted into the database as "bob\[hi\]yay\", thus allowing you to ignore the brackets?

- Depending on the number of tags you have, you can disallow invalid tags.