I have an url that looks like this http://apploadny.appload.nu/tjanster/webbutveckling/ I want to get the ID of the page "tjanster", how can i do that?
I think what you need is:
<?php $post_id = $post->ID; //or somehow get the current post ID. $ancestors = get_post_ancestors($post_id) //$ancestors is an array of post IDs starting with the current post going up the root //'Pop' the root ancestor out or returns the current ID if the post has no ancestors. $root_id = (!empty($ancestors) ? array_pop($ancestors): $post_id);
For more info check: http://codex.wordpress.org/Function_Reference/get_post_ancestors