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Laravel observer check if field changed

class UserObserver
{


    /**
     * Listen to the User created 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');
      }
    }

}

Source: stackoverflow.com

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