XML_ErrorString   137 xml/expat_compat.h PHPAPI const XML_Char *XML_ErrorString(int);
XML_ErrorString  1523 xml/xml.c      	str = (char *)XML_ErrorString((int)code);
XML_ErrorString   725 xmlrpc/libxmlrpc/xml_element.c          const char * error_str = XML_ErrorString(err_code);