regex problem

I'm trying to get a simple regex to work. Here is the test script I have. #!/usr/bin/php -q <? $string = "hello\nworld\n"; $string = preg_replace("/[^\r]\n/i","\r\n",$string); $string = addcslashes($string, "\r\n"); print $string; ?> This outputs hell\r\nworl\r\n so it's removing the char before the \n also. I just want it to replace a lone \n with \r\n -Josh