Get ID of “root-page”

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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?

2 Answers
2

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

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