Saving custom wordpress form data into database

Hi,
i have created form (“Name form”) using fluent form in wordpress and then i have used this form in a page (“Name Page”). The form has two text box (“first name”) and (“last name”). in the sql database (cpanel) i have also created table with same structure (“fname” as a varchar) and (“lname” as a varchar).

now when i load the page (“Name Page”) the form loaded perfectly. but i want to store the values for both into the database once i click submit button.

i tried to write php file , but it didnt work. i didnt know how to get the value of the text boxes from the form and pass them to the database. i also didnt know how to call the php file and where shall i put the file under which folder in the server.

i have been looking for solution for more than a week and searching everywhere to find simple and detailed solution step by step how to do that without any luck? please help me.

• This topic was modified 6 years, 4 months ago by Jan Dembowski. Reason: Moved to Fixing WordPress, this is not an Developing with WordPress topic