Stig Bakken added the XML extension to PHP.
string utf8_decode(string data)
The utf8_decode function takes UTF-8 text and returns ISO-8859-1 text.
string utf8_encode(string data)
The utf8_encode function returns the data argument as UTF-8 text.
string xml_error_string(integer error)
The xml_error_string function returns the description for the given error code.
integer xml_get_current_byte_index(integer parser)
The xml_get_current_byte_index function returns the number of bytes parsed
so far.
integer xml_get_current_column_number(integer parser)