I want to run a function A() when a post is published and function B() when the same post is edited or updated.

For this, I found publish_post action which is triggered whenever a post is published, or if it is edited and the status is changed to publish.

How can I use this publish_post action to know that post has been edited or updated so that I can run function B()?

I want to run a function A() when a post is published and function B() when the same post is edited or updated.

For this, I found publish_post action which is triggered whenever a post is published, or if it is edited and the status is changed to publish.

How can I use this publish_post action to know that post has been edited or updated so that I can run function B()?

• posts
• actions
• publish

2 Answers 2

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

You could achieve this with save_post hook.

Example similar to code in codex

function run_my_function( $post_id ) {
  if ( wp_is_post_revision( $post_id ) ){
    // if post udpated
  } else {
    //if is new post
    }
}
add_action( 'save_post', 'run_my_function' );