<? ## the following line is only needed if built as a self-contained ## extension.  If you build the rrdtool module as an embedded ## extension, the rrd_* functions will always be available, so you ## do not need the dl() call. dl("rrdtool.so"); ## ## demonstration of the rrd_last() command ## $ret = rrd_last("/some/path/some-router-fe2.rrd"); if ( $ret != - 1 ) {     printf("Last update time:  %s\n", strftime("%m/%d/%Y %H:%M:%S"), $ret); } else {     $err_msg = rrd_error();     echo "Error occurred:  $err_msg\n"; }?>