i'm trying to send push notification when the wordpress admin insert new post.

I was looking for hours where to add my function and after a lot i found core function wp_insert_post inside wp-includes/post.php

that function returns the Post_ID, so i added my custom script before return:

include '../push/send_message.php';

The problem is that when i import these two rows here

function wp_insert_post($postarr, $wp_error = false) {
    if ( $update ) {
        do_action('edit_post', $post_ID, $post);
        $post_after = get_post($post_ID);
        do_action( 'post_updated', $post_ID, $post_after, $post_before);
    do_action('save_post', $post_ID, $post);
    do_action('wp_insert_post', $post_ID, $post);
    include '../push/send_message.php';
    return $post_ID;

nothing happen and when admin insert new post, the success page is blank. if i remove that line all is ok.. very strange.. Can someone give me a right way to do what i need?

  • What do you mean by "added my custom script before return"? Are you hacking the Core file? – s_ha_dum Jul 8 '13 at 16:26
  • if you see my answer, you can see that before return $post_ID i've added my two custom rows. I never worked with wordpress and i don't know how to do what i need and this is for me the smart solution. – JackTurky Jul 8 '13 at 16:27
  • That is a core function, you should never alter the core files. – Wyck Jul 8 '13 at 16:36

See those two hooks in the hacked Core code you posted?

do_action('save_post', $post_ID, $post);
do_action('wp_insert_post', $post_ID, $post);

Those are what you need to use to do this right.

function run_on_update_post($post_ID, $post) {
    var_dump($post_ID, $post); // debug
    include '../push/send_message.php';
    return $post_ID;

add_action('save_post', 'run_on_update_post', 1, 2);

save_post runs every time the post is saved. I can't swear that your function will work but you should be able to modify things to make it work. Just look at the var_dump and alter accordingly. The includes may not work either, as they are relative paths. You may have to change that as well.

  • Where i need to add add_action? – JackTurky Jul 8 '13 at 19:35
  • Putting that in a plugin would be best but it will work from the theme's functions.php. – s_ha_dum Jul 8 '13 at 19:37
  • ok, i add your code inside a plugin that i've activate. Inside callback function,i put a simple print_r($_POST);. The problem is that i see that only when i click on "create new article" and not when i publish it. How can i edit to achive what i need? – JackTurky Jul 8 '13 at 20:29
  • 1
    Put die; after your print_r($_POST);. Do you see it now? – s_ha_dum Jul 8 '13 at 20:39

Modifying core files is a no-go. The Plugin API provides the connection you need for doing this kind of things. The function you're modifying has plenty of hooks available. Also see: Actions and filters are NOT the same thing….

The solution is to create your own plugin *:

/* Plugin name: My first plugin */

add_action( 'wp_insert_post', 'callback_so_17530930', 10, 2 );

function callback_so_17530930( $post_ID, $post )
    // Adjust for the desired Post Type
    if( 'page' !== $post->post_type )

    include '../push/send_message.php';
    sendNotification( $post->post_title, $post->guid );

* See Where do I put the code snippets I found here or somewhere else on the web?

Just drop the plugin PHP file inside wp-content/plugins folder. Go to the dashboard plugins' page and activate. More details at the Codex.

  • ok, i add plugin and i've activated it. I put in your code, inside callback function, a simple print_r($_POST);. The problem is that i see that only when i click on "create new article" and not when i publish it. How can i edit to achive what i need? – JackTurky Jul 8 '13 at 20:27
  • Use the save_post action hook. Check this Answers for working examples. – brasofilo Jul 8 '13 at 20:31
  • if you see the answer above yours, @s_ha_dum says me to use save_post. Using it the result is the same as yours – JackTurky Jul 8 '13 at 20:33
  • I think the problem you posted is covered in both answers: use hooks for it to work. Now you're working with a different code. As I said, research within the working examples. To debug this specific hooks you need to die() after print_r()/var_dump(), or use FirePHP or similar. – brasofilo Jul 8 '13 at 20:39

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