How to set a custom message using form_alter in Drupal

At times we need to change the message that is displayed after a node is saved. Following code helps to customize using form_alter.

1. function mymodule_form_alter(&$form, &$form_state, $form_id)
2. {
3. if($form['form_id']['#value'] =='formvalue')
4. {
5. if($form['buttons']['submit']['#submit']){
6. $form['buttons']['submit']['#submit'][] = 'mymodule_submit_function';
7. }
8. }
9. }
10. function mymodule_submit_function($form, &$form_state){
11. global $_SESSION;
12. $insert = empty($form_state['values']['nid']);
13. if($insert){
14. //Write your custom message text here
15. if($form['nid']['#post']['form_id'] == 'formvalue'){
16. $keys = array_keys($_SESSION['messages']['status']);
17. $last_key = end($keys);
18. $message = 'My custom messge after node save';
19. $_SESSION['messages']['status'][$last_key] = $message;
20. }
21. }
22. }

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