(PHP 4, PHP 5)
xml_get_current_byte_index — Get current byte index for an XML parser
$parser
   )Gets the current byte index of the given XML parser.
parserA reference to the XML parser to get byte index from.
   This function returns FALSE if parser does
   not refer to a valid parser, or else it returns which byte index
   the parser is currently at in its data buffer (starting at 0).
  
This function returns byte index according to UTF-8 encoded text disregarding if input is in another encoding.