How to Keep the selected value of the select box after Form POST or GET

Question

Im trying to implement the search feature in my website.

when the search keyword is entered in the textbox, and the category combo is selected, the form will be Pos

Answer 1

Easy solution: If select box values fetched from DB then to keep selected value after form submit OR form POST

 
        get_results( 'SELECT * FROM countries' ); ?>
        
        
        
        
        country_name ? 'selected="selected"':''); ?> value="country_name; ?>">country_name; ?>