Here's my situation. I want to use a modified version of the WordPress Press This bookmarklet to pass the current page URL to a custom field on my post. In this case, let's say my custom field is linked_list_url.
I'm guessing there are four pieces to this:
- Add a custom input field to the page generated by the bookmarklet
- Grab the URL of the page the bookmarklet was used on and store it
- Pass the stored URL to the custom input field
- Pass the contents of the custom input field to WordPress, setting it as the key for the custom field
I've modified the bookmarklet to have a custom input field and it's pulling the URL off of the page and passing it to the input box, but when I submit the bookmarklet, nothing is passed to WordPress.
Here's my press-this custom bookmarklet: http://pastebin.com/UjNkpNrE
Specifically: Once I have the URL passed to the custom input field in the bookmarklet, how should I go about having the contents of that field passed to WordPress into the custom field linked_list_url?
admin_head-post-new.phpand setting a custom field value based on a parameter passed in the query string.../wp-admin/press-this.phpfile to achieve this? Because it's not a good idea to change core files, you should try to find a hook to do what you want from a plugin file, so you can survive upgrades. I think your first three steps are solved in the_wp_http_refererform field, and you can solve step four in thewp_insert_posthook.