Find Number of Open Sessions

by 
<?
// you must set your own accessible session path atop every page.
session_save_path("/home/some/other/location/"); # SECURITY VIOLATION!!!
session_start();

function session_count() {
  $filter = "sess_";
  $files = scandir(session_save_path());
  $count = 0;
  foreach ($files as $file) {
    if(strpos($file,$filter)===0) {
      $count += 1;
    }
  }
  return $count;
}

echo session_count();
?>

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