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post_updated filter
Fires once an existing post has been updated.
do_action( 'post_updated', int $post_ID, WP_Post $post_after, WP_Post $post_before )
Description
This is action hook , its fires once an existing post has been Updated.
By using this hook , you can get diffrence between $post_before and $_post_after.
Its consists of three parameters, one is $post->ID, second is $post_before and last one is $post_after.
Try updating or adding a post. You should see some output there because this is when WordPress is calling hook function.
Then in order to check to see if there was a change compare the two titles from the two before and after post objects
function check_values($post_ID, $post_after, $post_before){
if( $post_after->post_title !== $post_before->post_title ) {
// do something
}
}
add_action( 'post_updated', 'check_values', 10, 3 );
Parameters
- $post_ID : (int) Post ID.
- $post_after : (WP_Post) Post object following the update.
- $post_before : (WP_Post) Post object before the update.
Live Example
To run the hook, copy the example below.
// run the action do_action( 'post_updated', $post_ID, $post_after, $post_before);
The following example is for adding a hook callback.
// define the post_updated callback function action_post_updated( $post_ID, $post_after, $post_before ) { // make action magic happen here... }; // add the action add_action( 'post_updated', 'action_post_updated', 10, 3 );
To remove a hook callback, use the example below.
// remove the action remove_action( 'post_updated', 'action_post_updated', 10, 3 );
<?php function check_values($post_ID, $post_after, $post_before){ echo '<b>Post ID:</b><br />'; var_dump($post_ID); echo '<b>Post Object AFTER update:</b><br />'; var_dump($post_after); echo '<b>Post Object BEFORE update:</b><br />'; var_dump($post_before);
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