Let's say that you would like to create a simple questionnaire for one of your Web pages. For example, you would like to ask for the reader's name, sex, age and comment, and then process it in a CGI script. The HTML form might live in a file named http://www.howstuffworks.com/survey.htm and look like this:
<html> <body> <h1>HSW Survey Form<h1> <FORM METHOD=POST ACTION="http: //www.howstuffworks.com/cgi-bin/survey.cgi"> Enter Your Name: <input name="Name" size=20 maxlength=50> <P>Enter your sex: <input type=radio CHECKED name=sex value=MALE>Male <input type=radio name=sex value=FEMALE>Female <P>Select your age<br> <SELECT size=2 NAME=age> <OPTION> 1-10 <OPTION> 11-20 <OPTION> 21-30 <OPTION> 31-40 <OPTION> 41-50 <OPTION> 51-60 <OPTION> 61 and up </SELECT> <P>Enter Your Comment: <input name="Name" size=40 maxlength=100> <P> <INPUT TYPE=submit value="Submit"> <INPUT TYPE=reset value="Reset"> </FORM> </body> </html>
The CGI script referenced by this form will receive four different pieces of data: the name, age, sex and comment of the reader who submits the form. The script will have to parse out the four values and handle all of the character transformations. A separate file called http://www.howstuffworks.com/survey.c was used to create the script survey.cgi and is perhaps 100 lines long.