brynzovskii · March 15, 2018 13:17
diff --git a/before-post-inserting-hook.php b/before-post-inserting-hook.php
 <?php 
 add_action( 'wp_insert_post', 'wpse128767_add_meta' );
 function wpse128767_add_meta( $post_id ) {
    // do something here, add post meta for example  
    add_post_meta( $post_id, 'key', 'value' );
 }
	<?php
	add_action( 'wp_insert_post', 'wpse128767_add_meta' );
	function wpse128767_add_meta( $post_id ) {
	// do something here, add post meta for example
	add_post_meta( $post_id, 'key', 'value' );
	}