note 15406 added to faq.html

Suppose I have a form with two buttons to add and update data in a database. In the PHP script section in the same file, I have two functions that perform these actions. Now, my question is how do I differentiate between which button was pressed so I can call the corresponding function. Kindly give me some help as soon as possible. Thank you. http://www.php.net/manual/en/faq.html.php