Custom Meta fields Update hook?

Question

HI Is there any hook available that we can add it into functions.php and fire only when "Custom meta fields gets edited" ? I really need this . If anyone with the knowledge , please help me.

Till now, I've discovered save_post hook but it only fires when post title field or Description fields gets edited. IN my case I've one custom post type "property" with so many custom meta fields with it. and I need to find some hook which works same as save_post but when custom fields gets edited.

Thanks

Answer 1

Yes, there is number of hooks in generic low level update_metadata() function. Limited to the post meta you would probably want to use update_postmeta or updated_postmeta.

Answer 2

This hook updated_{$meta_type}_meta is called after a call to update_metadata succeeds.

<?php add_action( "updated_{$meta_type}_meta", $function_name', 10, 4 ); ?>

For example, to respond to updates to post metadata:

<?php
    add_action( 'updated_post_meta', 'my_update_post_meta', 10, 4 );

    function my_update_post_meta($meta_id, $post_id, $meta_key, $_meta_value) 
    {
        //do stuff
    }

?>