How to populate combo box using php??

I use two combo in forms. One for Country and other for City. What i do when i selected Country the City combo is populated through country. Thanks in Advance.

re: How to populate combo box using php??

AJAX is the preferred method of doing this.

When one drop down is changed, you make a request to your PHP script, telling it which country was selected. It then queries a database (if you're using one) and returns the cities in that country. You then use javascript to populate the city drop down with the cities returned by the request.

Mark.