I'm familiar with custom re-design of examples in pChart and until now I made few chart without error but all these chart had data inside chart script, inside line
but I need to use it together with html form filled by user and based on submitted data to show chart bellow form with data. I tried it many times but no result. After submit form I have read form's text field values in chart's script and made an array of them and I used it as

and it works but I got chart in separate tab, window but I need it, as I stated, bellow form that gave data for chart. Is it possible to achieve? Thanks in advance.

Possible with some work.

So you need one file. It needs the HTML for the form. The form needs to be set to be processed by the same page when submitted. You need to test if the page was submitted, and if so then process the graph drawing. This covers most of it http://www.html-form-guide.com/php-form ... -self.html.