WordPress Get the Page ID outside the loop
I want to get the page ID before starting the loop in WordPress. I am using
$page = get_query_var('page_id');
Apparently, it returns nothing.
I just want to check a page for its ID and add a class to <body> tag based on it.
Answer
If you're using pretty permalinks, get_query_var('page_id') won't work.
Instead, get the queried object ID from the global :$wp_query
// Since 3.1 - recommended!
$page_object = get_queried_object();
$page_id = get_queried_object_id();
// "Dirty" pre 3.1
global $wp_query;
$page_object = $wp_query->get_queried_object();
$page_id = $wp_query->get_queried_object_id();