how to make a dependent drop down with php MySQL from only one table and on select other option one text box open to insert new value??

Question

suppose a table name research and column id, category, subcategory. for a category corresponding subcategory is opened on another drop down if not in list, text box is opened.

Answer 1

Start by associating php to mysql code. Once you are able to get sql query executed like displaying result, use an insert statement. Please let me know if you have a more specific question.