mysqlnd_options4 1137 ext/mysqlnd/mysqlnd.c mysqlnd_options4(conn_handle, MYSQL_OPT_CONNECT_ATTR_ADD, "_client_name", "mysqlnd"); mysqlnd_options4 110 ext/mysqlnd/mysqlnd_libmysql_compat.h #define mysql_options4(c,a,k,v) mysqlnd_options4((c), (a), (k), (v))