June 2002
Beginner
759 pages
80h 42m
English
Content preview from Perl in a Nutshell, 2nd Edition
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
A Typical CGI Interaction
For an example of a CGI application, suppose you create a guestbook for your website. The guestbook page asks users to submit their first name and last name using a fill-in form composed of two input text fields. Figure 9-1 shows the form you might see in your browser window.
Figure 9-1. HTML form
The HTML that produces this form might read as follows:
<HTML><HEAD><TITLE>Guestbook</TITLE></HEAD> <BODY> <H1>Fill in my guestbook!</H1> <FORM METHOD="GET" ACTION="/cgi-bin/guestbook.pl"> <PRE> First Name: <INPUT TYPE="TEXT" NAME="firstname"> Last Name: <INPUT TYPE="TEXT" NAME="lastname"> <INPUT TYPE="SUBMIT"> <INPUT TYPE="RESET"> </FORM>
The form is written using special “form” tags, as follows:
The
<form>tag defines the method used for the form (either GET or POST) and the action to take when the form is submitted—that is, the URL of the CGI program to pass the parameters to.The
<input>tag can be used in many different ways. In its first two invocations, it creates a text input field and defines the variable name to associate with the field’s contents when the form is submitted. The first field is given the variable namefirstnameand the second field is given the namelastname.In its last two invocations, the
<input>tag creates a “submit” button and a “reset” button.The
</form>tag indicates the end of the form.
When the user presses the “submit” button, data ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.