How to get nid from URL alias in drupal 7?

Question

I have a URL alias sitepath/john/video/nature-beauty where john = user, video = content type and nature-beauty = node. I am trying to get nid of node nature-beauty. Node title is "Nature beauty" actually. I have set node title in URL alias.

Can anyone tell me where am I wrong in below code?

   $last_page_visited = $_SERVER['HTTP_REFERER'];
   $alias =$last_page_visited;
   $path = drupal_lookup_path("source", $alias);
   $node = menu_get_object("node", 1, $path);
   $nid=$node->nid;
   print $nid;

Answer 1

The $_SERVER['HTTP_REFERER'] will return the full URL, but the function drupal_lookup_path() takes only the alias as argument, so parse you URL and pass only the alias, john/video/nature-beauty then it will work.

$url = $_SERVER['HTTP_REFERER'];
$path = preg_replace('/\//','',parse_url($url,PHP_URL_PATH),1);
$org_path = drupal_lookup_path("source", $path);
$node = menu_get_object("node", 1, $org_path);
$nid=$node->nid;
print $nid;

Answer 2

There are number for of ways to get nid but its depend how your page is build. If its a direct node page then you can get using $_GET["q"] or using arg() function. You can also use menu_get_object() function directly and get the $nid=$node->nid;.

• $_GET["q"] would return like node/2345 2345 is your node nid.
• arg(1) would return node nid.

Answer 3

There is nothing wrong in your code. Just use drupal_get_path_alias instead of $_SERVER['HTTP_REFERER']; to get url alias.

If you want to use $_SERVER['HTTP_REFERER'] you need to parse the it like follows.

   $path = $_SERVER['HTTP_REFERER'];
  $filter = preg_replace('/\//','',parse_url($path,PHP_URL_PATH),1);
   $path = drupal_lookup_path("source", $filter);
   $node = menu_get_object("node", 1, $path);
   $nid=$node->nid;
   print $nid;

Answer 4

$path = drupal_get_path_alias($_GET['q']); 
$path = explode('/', $path);
echo $nid = $path[1];

Or simply arg(1) will return the node id of the page By using this, you can get the nid of any node. But it should be the detail page of any node

Answer 5

global $base_url;
$referrer = substr($_SERVER['HTTP_REFERER'], drupal_strlen($base_url));
$referrer = drupal_get_normal_path($referrer);
$referrer = trim($referrer, '/');
if (arg(0, $referrer) == 'node' && is_numeric(arg(1, $referrer)) {
  $nid = arg(1, $referrer);
}

That's it. $base_url includes subdirectory, if your site is not in server root: http://example.com/drupalsite. drupal_get_normal_path transforms alias into drupal internal path, that is, article/marvelous into node/101. It is actually a wrapper around drupal_lookup_path, so the use of the latter is discouraged. And then you get your nid.