MySQL and Perl for the Web

A Short Form Element Demonstration

Let’s write a short script, elt_demo.pl, that shows how to use the material discussed in the earlier part of this chapter.The script is simple but does several things:

• It generates a form that includes an instance of each type of element we’ve discussed so far. You can select or fill in elements and then submit the form.

• The script is self-referential; it not only generates the form, it also processes it by causing itself to be invoked when you select the Submit button.

• elt_demo.pl examines its CGI environment using param() to determine whether information for a submitted form is present. If so, it extracts and displays that information to enable you to see how various types of fields are received by the Web ...