Find Out Form ID Easily with Get Form ID Module for Drupal 7

"How to find form id in Drupal" is one of the most popular questions, especially for the beginners.

More experienced developers know that to find form id you need to either look into the DOM source code or to create your own hook_form_alter() function like this:

function YOUR_MODULE_NAME_form_alter(&$form,&$form_state,$form_id){
  dpm($form_id);}