Laravel: Check with Observer if Column was Changed on Update

You don't have to get the user again from the database. The following should work:

public function updating(User $user)
{
  if($user->isDirty('email')){
    // email has changed
    $new_email = $user->email; 
    $old_email = $user->getOriginal('email'); 
  }
}

Edit: Credits to https://stackoverflow.com/a/54307753/2311074 for getOriginal

As tadman already said in the comments, the method isDirty does the trick:

class UserObserver
{


    /**
     * Listen to the User updating event.
     *
     * @param  \App\User  $user
     * @return void
     */
    public function updating(User $user)
    {
      if($user->isDirty('email')){
        // email has changed
        $new_email = $user->email; 
        $old_email = $user->getOriginal('email');
      }
    }

}

If you want to know the difference between isDirty and wasChanged, see https://stackoverflow.com/a/49350664/2311074