do_action( ‘post_updated’, int $post_id, WP_Post $post_after, WP_Post $post_before )

User Contributed Notes

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   Tunn 3 years ago

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   This hook does not compare values of post meta keys if you have changed those as well. $post_after and $post_before will include strictly the new/old post data without meta fields of post.
2. Skip to note 4 content

   Steven Lin 5 years ago

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   Example migrated from Codex:

   Suppose we have a post named Original Title and we edit it to Edited Title. Let’s hook to post_updated to check what has changed:

   Let’s hook to post_updated to check what has changed:

   <?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);
   }
   
   add_action( 'post_updated', 'check_values', 10, 3 ); //don't forget the last argument to allow all three arguments of the function
   ?>

   The Result then would be this:
   
Post ID:
int 1403
Post Object AFTER update:
object(WP_Post)[7722]
public 'ID' => int 1403
public 'post_author' => string '1' (length=1)
public 'post_date' => string '2014-08-10 18:19:43' (length=19)
public 'post_date_gmt' => string '2014-08-10 18:19:43' (length=19)
public 'post_content' => string (length=0)
public 'post_title' => string 'Edited Title' (length=12)
public 'post_excerpt' => string (length=0)
public 'post_status' => string 'publish' (length=7)
public 'comment_status' => string 'closed' (length=6)
public 'ping_status' => string 'closed' (length=6)
public 'post_password' => string (length=0)
public 'post_name' => string 'edited-title' (length=12)
public 'to_ping' => string (length=0)
public 'pinged' => string (length=0)
public 'post_modified' => string '2014-08-10 19:41:46' (length=19)
public 'post_modified_gmt' => string '2014-08-10 19:41:46' (length=19)
public 'post_content_filtered' => string (length=0)
public 'post_parent' => int 0
public 'guid' => string 'http://localhost:8888/mysite/?post_type=test_post&p=1403' (length=67)
public 'menu_order' => int 0
public 'post_type' => string 'procedimentos' (length=13)
public 'post_mime_type' => string (length=0)
public 'comment_count' => string '0' (length=1)
public 'filter' => string 'raw' (length=3)
Post Object BEFORE update:
object(WP_Post)[7724]
public 'ID' => int 1403
public 'post_author' => string '1' (length=1)
public 'post_date' => string '2014-08-10 18:19:43' (length=19)
public 'post_date_gmt' => string '2014-08-10 18:19:43' (length=19)
public 'post_content' => string (length=0)
public 'post_title' => string 'Original Title' (length=14)
public 'post_excerpt' => string (length=0)
public 'post_status' => string 'publish' (length=7)
public 'comment_status' => string 'closed' (length=6)
public 'ping_status' => string 'closed' (length=6)
public 'post_password' => string (length=0)
public 'post_name' => string 'original-title' (length=14)
public 'to_ping' => string (length=0)
public 'pinged' => string (length=0)
public 'post_modified' => string '2014-08-10 19:41:14' (length=19)
public 'post_modified_gmt' => string '2014-08-10 19:41:14' (length=19)
public 'post_content_filtered' => string (length=0)
public 'post_parent' => int 0
public 'guid' => string 'http://localhost:8888/mysite/?post_type=test_post&p=1403' (length=67)
public 'menu_order' => int 0
public 'post_type' => string 'procedimentos' (length=13)
public 'post_mime_type' => string (length=0)
public 'comment_count' => string '0' (length=1)
public 'filter' => string 'raw' (length=3)