How do I prevent `<br>` from parsing inside my `[code]` tags?

问题

I am having some trouble (again :P) with my BB-code system. I finally got [code] tags working using Syntax Highlighter. Now there is one problem, that when "enter" is pressed inside the script (AKA next line), the bb-code causes that enter to be replaced with <br> which means the script does not correctly render the code using Syntax Highlighter.

Example picture:

How do I create an exception in my code, that ignores the <br> when it is inside [code] lines?

My current bbcode.php (there are more things in those arrays, but they are not relevant):

function bbcode($input) {
  $find = array( 
    "@\n@", 
    "/\[code\=(.+?)\](.+?)\[\/code\]/is"
  );
  $replace = array( 
    "<br />",
    "<pre class='brush: $1;'>$2</pre>"
  );
  $input = htmlspecialchars($input);
  $input= preg_replace($find, $replace, $input);
  return $input;
}

To sum it up: How do I prevent <br> from parsing inside my [code] tags?

Thanks ahead!

来源：https://stackoverflow.com/questions/23583075/how-do-i-prevent-br-from-parsing-inside-my-code-tags