(PHP 4 >= 4.0.6, PHP 5)
mb_http_output — Set/Get HTTP output character encoding
   Set/Get the HTTP output character encoding.
   Output after this function is called will be converted from the set internal encoding to encoding.
  
encoding
       If encoding is set,
       mb_http_output() sets the HTTP output character
       encoding to encoding.
      
       If encoding is omitted,
       mb_http_output() returns the current HTTP output
       character encoding.
      
   If encoding is omitted,
   mb_http_output() returns the current HTTP output
   character encoding. Otherwise, 
   Returns TRUE on success or FALSE on failure.