Symphony.

Cannot modify header information - headers already sent

You mean that? You are not allowed to output anything before using header(). Since you're doing an echo() right before that you're forcing PHP to send all headers and start with the content. Trying to set headers afterwards will result in the error you're seeing now.

The solution: comment out the echo() statement.

Hi phoque, thanks. I removed the var_dump and echo's, and now is redirecting to:
http://beta.marciotoledo.com/internal_error.html/

http://beta.marciotoledo.com/

Resolved, thanks for all: phoque, Lewis, nickdunn.

Here is the final code: https://gist.github.com/59ba4c27d8c92c8b704e