Ticket #32933: 32933.diff

src/wp-includes/post.php

@@ -2624 +2624 @@
                 return wp_delete_attachment( $postid, $force_delete );
 
         /**
+         * Filter whether a post deletion should take place.
+         *
+         * @since 4.4.0
+         *
+         * @param bool    $delete       Whether to go forward with deletion.
+         * @param WP_Post $post         Post object.
+         * @param bool    $force_delete Whether to bypass the trash.
+         */
+        $check = apply_filters( 'pre_delete_post', null, $post, $force_delete );
+        if ( null !== $check ) {
+                return $check;
+        }
+
+        /**
          * Fires before a post is deleted, at the start of wp_delete_post().
          *
          * @since 3.2.0