<?
session_start();

$dir=opendir("/tmp");
$onSession = 0;
while(($read=readdir($dir)) !== false){

       $when_read = explode("_",$read);
       $read0 = $when_read[0];
       if ( $read0 == "sess" )
       {
              $fh = fopen('/tmp/'.$read, 'r');
              while (!feof($fh))
              {
                     $vContent = fread($fh,2098);
              }
              fclose($fh);
              IF ( 0 < strlen($vContent) ) { $onSession++; }
       }
}

echo date("Y.m.d. H시i분")." - ".$onSession." 접속";
?>