If you need to post code, use the [ high=language][/high ] tags (remove the spaces). It will automatically add syntax highlighting.
Example:
[high=php]
header('Location: http://www.wickedfire.com');
[/high]
Based on syntaxhighlighter
Example:
[high=php]
header('Location: http://www.wickedfire.com');
[/high]
Based on syntaxhighlighter