Drupal 7 Core Module Function for node_save?

Question

In Drupal 7, i want to put a additional code when the Save button is Clicked (Saving) in "a content" form (New or Edit).

I don't want to know the hook (because i don't want to make an obvious Custom Module). Because i don't want to let other users know the operation by having a obvious Custom Module which will be listing inside the Module Panel. So i want to make a Silent Customization inside the Existing Drupal Core Module (correspondence Function).

Thats why I just want to know the Function in the Core Modules which finally process the Node Save task.

• Can anyone please describe which Function (in Core Modules) is finally processing the Drupal Node Save? (Save` finally may be for both New Item Insert or existing Item Edit.)

Answer 1

DO NOT HACK CORE

Now that's out of the way, let's continue.

The way I see it, you have a couple of options:

1) Use Rules.

The rules module allows site administrators to define conditionally executed actions based on occurring events (known as reactive or ECA rules). It's a replacement with more features for the trigger module in core and the successor of the Drupal 5 workflow-ng module.

Although this will allow people to see that there is code being run.

2) Create a custom module, but in your info file make use of the hidden property:

As of version 7.x, modules and themes may specify that they should not be visible on the modules page by adding hidden = TRUE. This is commonly used with testing modules used with SimpleTest where end-users should never enable the testing modules.