WordPress is really powerful. It is powerful from the start, but its power also stems from the large offering of plugins it provides. However, I did not found one plugin that did what I wanted: receive notifications when one of your articles is modified by someone else. So I wrote my own, taking another one as a start.

It is very basic and may not be suited for everyone’s need, but anyway, you can download it.

This work is based on the draft notification plugin.

<?php
/*
Plugin Name: Post notifier
Plugin URI: https://www.x2b4.com/
Description: Sends an email to the post author when a post is modified.
Author: x2b4
Version: 1.0a
Author URI: https://www.x2b4.com/
*/

https://www.x2b4.com/based on http:https://www.x2b4.com/www.dagondesign.com/articles/draft-notification-plugin-for-wordpress/

function notification_process($id) {

 global $wpdb;

 $result = $wpdb->get_row("
 SELECT post_status, post_title, user_login, user_nicename, display_name, {$wpdb->users}.ID
 FROM {$wpdb->posts}, {$wpdb->users}
 WHERE {$wpdb->posts}.post_author = {$wpdb->users}.ID
 AND {$wpdb->posts}.ID = '$id'
 ");

 global $current_user;
 get_currentuserinfo();

 if (($result->ID != $current_user->ID))
 {
 $message = "";
 $message .= "A post has been edited on '" . get_bloginfo('name') . "'\n\n";
 $message .= "Title: " . $result->post_title . "\n\n";
 $message .= "Original author: " . $result->display_name . "\n\n";
 $message .= "Editor: " . $current_user->display_name . "\n\n";
 $message .= "Link: " . get_permalink($id) . "\n\n";

 $result2 = $wpdb->get_row("SELECT {$wpdb->posts}.ID FROM {$wpdb->posts} WHERE `post_type` = 'revision' AND `post_parent` ='".$id."' ORDER BY `ID` DESC");
 $message .= "Diff: ".get_bloginfo("wpurl")."/wp-admin/revision.php?action=diff&right=".$id."&left=".$result2->ID;

 $subject = "Post '" . $result->post_title . "' updated on '" . get_bloginfo('name') . "' by " . $current_user->display_name;

 $user_info = get_userdata($result->ID);
 $recipient = $user_info->user_email;
 $headers = 'From: WordPress<wordpress@x2b4.com>' . "\r\n";
 mail($recipient, $subject, $message, $headers);
 }

}

add_action('publish_post', 'notification_process');

?>