Easiest way to simulate WordPress’s URL resolution to retrieve post ID, etc?

3 comments

1. As Weston mentioned, if you’re within WordPress and you know what blog the URL came from, then ask WordPress for the blog ID.

   But if you’re really, really sure there’s no better method in this case than parsing a URL, then here you go:

   $url = 'http://myblog.mysite.com/2012/03/16/whatever/';
   
   $domain = parse_url( $url, PHP_URL_HOST );
   
   // This could be dynamic but good enough for now
   $subdomain = str_replace( '.mysite.com', '', $domain );
   
   // Never use $blog_id for anything, you'll break tons of things
   $parsed_blog_id = get_id_from_blogname( $subdomain );
   
   
   // url_to_postid() only works for the current blog
   switch_to_blog( $parsed_blog_id );
   
   $post_id = url_to_postid( $url );
   
   restore_current_blog();
   

   Reference material:

   http://codex.wordpress.org/Function_Reference/get_id_from_blogname

   http://codex.wordpress.org/Function_Reference/url_to_postid

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2. Plain and simple, to get the post id you just use:

   <?php 
   echo get_the_ID(); 
   ?>
   

   That will echo out the post id.

   And:

   <?php 
   echo get_current_blog_id(); 
   ?>
   

   Will echo out the blog id.

   http://codex.wordpress.org/Function_Reference/get_the_ID

   and

   http://codex.wordpress.org/Function_Reference/get_current_blog_id
   respectively

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3. The best solution I’ve found for this is the Monkeyman Rewrite Analyzer plugin. It was written by a member of the WPSE community in response to a few similar requests some time ago.

   You can give it any URL for your site, and it will tell you explicitly how that request will be mapped/interpreted by WordPress.

   For example:
   

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