Thanks @catacaustic
So, I conceptually I understand now that I do the following:
In my Javascript:
- Use Jquery+Ajax to set a GET or POST request to a PHP file on the server, with the user id, meta data key, and value (for POST)
- Wait for response and process accordingly
On The server:
- Have a PHP file that responds appropriately to the GET and POST requests, to retrieve or add/update the user meta data?
- This PHP scripts will use the wp_get_user_data and wp_update_user_data functions.
So I have additional questions:
- Do I have to do anything special for this to work for a (logged in) user updating their own meta data?
- Where in the WordPress folder hierachy should I put my PHP script? Does it matter?
- Is there a limit to the length of a string I can pass as the meta data parameter?
- In the PHP script is it correct that I use the $_POST[] array to access the parameters I have passed in the request?
- And I can pass multiple parameters? (e.g. meta keyname and meta data)
Thanks
