How to make one drop down dependent on another drop down

Question

Like we select country and its releted states come

Answer 1

https://code.sololearn.com/W6rqi00oXPVn/?ref=app

Answer 2

Ruby 🌿 To insert html data into db table, you would need to setup db table with a db schema

From frontend, html file, set the select input in a form tag, form tag with PHP action and method attributes.

Setup a PHP script to process post data and save the data into db table from backend.

For more details, please refer to this file
https://code.sololearn.com/w8oD4T90kXp6/?ref=app

Please note that you need a PHP server with MySQL db installed before you could execute this script, and it would not run from the code playground.

Answer 3

Calviղ now this selected value
Pass to my Sql how