Você procurou por: nul (Coreano - Inglês)

tang shi nul
mo have yo

요 ssuh ddae 어 nul
how was your day

tang shi nul won hae yo
won hae yo

also, both ie and lynx ignore any nuls (\0) in the html stream, netscape does not. the best way to check for this is to compile the command line version of php (also known as the cgi version) and run your script from the command line. in *nix, pipe it through od -c and look for any \0 characters. if you are on windows you need to find an editor or some other program that lets you look at binary files. when netscape sees a nul in a file it will typically not output anything else on that line whereas both ie and lynx will.
the best way to check for this is to compile the command line the best way to check for this is to compile the command line version of php (also known as the cgi version) and run your script from the command line.