September 2002
Intermediate to advanced
544 pages
13h 6m
English
Content preview from Sams Teach Yourself CGI in 24 Hours, Second Edition
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Handling Errors with CGI::Carp
One of the most useful tools for Web developers who are trying to figure out how to fix broken CGI scripts is the server’s error log. If a CGI program dies due to a runtime error, the error message that the program generated when it died is stored in the error log. Unfortunately, these error messages generally aren’t time stamped or marked with the name of the program that generated them. The CGI::Carp module solves that problem.
When you add the line
use CGI::Carp;
at the beginning of a CGI program, the module traps the die and warn functions, adds a time stamp and program identification information to the error message, and saves the message in the error log. Here’s an error log entry for a program that does ...
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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.