[wp-hackers] update_option problem

[Peter Westwood]

On 14 May 2009, at 00:59, aesqe wrote:

> Hi all :)
>
> I've been trying to figure out why the following doesn't work:
>
> <?php
> /*
> Plugin Name: permalink check
> Plugin URI: ...
> Description: ...
> Author: ...
> Version: 1.0
> Author URI: ...
> */
>
> function permalinkage()
> {
> 	global $wp_rewrite;
> 	echo $wp_rewrite->get_category_permastruct();
> }
> add_action('update_option_permalink_structure', 'permalinkage');
> ?>
>
> Permalink structure gets updated, but get_category_permastruct()  
> returns previous value each time.
>
> Is this related to option caching, maybe?
>

No.

The reason here is that your are asking for the information before it  
has been updated.

The process goes as follows in WP_Rewrite:

	function set_permalink_structure($permalink_structure) {
		if ($permalink_structure != $this->permalink_structure) {
			update_option('permalink_structure', $permalink_structure);
			$this->init();
		}
	}

The WP_Rewrite::init function is what reconfigures the rewrite engine  
with the new permalink structure and so until that has been called you  
will get the old configuration from the $wp_rewrite object.

At the moment there is not a hook that I can see that will let you act  
on this option change after it has been completed.

 From WordPress 2.8 you will be able to use the new  
'permalink_structure_changed' action which I have added to  
set_permalink_structure in [11325].

Cheers

westi
-- 
Peter Westwood
http://blog.ftwr.co.uk | http://westi.wordpress.com
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