Hello to everybody. I did not have experience on PHP/HTML so I need your help for better understand how can I execute a query with a parameter wich is insert by the user. If it is possible I need a sample example

For example on the page the use must see a simple form like :

From cod ______ to cod______

The after he is submit the form must display the grid with the result of the query :

Select * from clienti where cod between $param1 and $param2

Thanks a lot !!!!