librenms-librenms/html/includes/vars.inc.php

<?php

foreach ($_GET as $key=>$get_var)
{
  if (strstr($key, "opt"))
  {
    list($name, $value) = explode("|", $get_var);
    if (!isset($value)) { $value = "yes"; }
    $vars[$name] = $value;
  }
}

$segments = explode('/', trim($_SERVER['REQUEST_URI'], '/'));

foreach ($segments as $pos => $segment)
{
  $segment = urldecode($segment);
  if ($pos == "0")
  {
    $vars['page'] = $segment;
  } else {
    list($name, $value) = explode("=", $segment);
    if ($value == "" || !isset($value))
    {
      $vars[$name] = yes;
    } else {
      $vars[$name] = $value;
    }
  }
}

foreach ($_GET as $name => $value)
{
  $vars[$name] = $value;
}

foreach ($_POST as $name => $value)
{
  $vars[$name] = $value;
}