With the post_updated
hook you can trigger an action when the post is updated. He passes 3 parameters:
$post_ID
(the post ID),$post_after
(the post object after the edit),$post_before
(the post object before the edit)
Here’s an example:
<?php
function check_values($post_ID, $post_after, $post_before){
echo 'Post ID:';
var_dump($post_ID);
echo 'Post Object AFTER update:';
var_dump($post_after);
echo 'Post Object BEFORE update:';
var_dump($post_before);
}
add_action( 'post_updated', 'check_values', 10, 3 ); //don't forget the last argument to allow all three arguments of the function
?>
See reference Codex