Execute PHP without leaving page

Question

I have a form - textarea (named su) and submit button.

When the form is submitted, I need to

1. run a PHP script without refreshing/leaving

Answer 1

It is usually best to use a Javascript library for doing AJAX.

See jQuery.get() for one way to send a request to a PHP web page using the jQuery library. You can have your PHP page output Javascript to be executed, or output plain text or data.