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For 2023 (and 2024 ...) - we are now fully retired from IT training.
We have made many, many friends over 25 years of teaching about Python, Tcl, Perl, PHP, Lua, Java, C and C++ - and MySQL, Linux and Solaris/SunOS too. Our training notes are now very much out of date, but due to upward compatability most of our examples remain operational and even relevant ad you are welcome to make us if them "as seen" and at your own risk.

Lisa and I (Graham) now live in what was our training centre in Melksham - happy to meet with former delegates here - but do check ahead before coming round. We are far from inactive - rather, enjoying the times that we are retired but still healthy enough in mind and body to be active!

I am also active in many other area and still look after a lot of web sites - you can find an index ((here))
What is CGI.pm / A dozen new examples

Perl's CGI.pm module allows both a structured and Object Oriented approach to generating and handling web pages via the Common Gateway Interface. It was written (a long time ago now) to provide a library of routines to help Perl programmers write web applications without having to (re)write or roll their own Common Gateway Interface code, and to provide a logically robust tool to ensure that tags balanced, via functions which generate both open and close elements writing the same single call.

CGI.pm - with so much to do - is a very large module, and there are a lot of different function calls to learn if you're going to use all the parts of it. So it is arguable as to how much you gain by using it - in other words, whether the positives outweigh the negatives. Personally, I make use of some elements such as CGI::Cookie, which provides Perl code to handle the unique date stamp format that cookies, use, then I 'roll my own' for the rest. But then I am a bit of a geek who knows the protocols, and I'm always looking for lean demos ...

We have a major training module on Using the CGI.pm modules, which we present briefly during our Perl on the Web course. There are over a dozen source code examples there ... and yesterday, I notes that they weren't available on our web site for delegates to access after the course ... well - the are now - follow this link!
(written 2009-06-12)

 
Associated topics are indexed as below, or enter http://melksh.am/nnnn for individual articles
P412 - Perl - Using CGI.pm

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Sending awkward characters by email in Perl
Loading external code into Perl from a nonstandard directory
Transforming data in Perl using lists of lists and hashes of hashes
Why sendmail one way, and pop3 the other?
What is CGI.pm / A dozen new examples
Running a piece of code is like drinking a pint of beer
Do not re-invent the wheel - use a Perl module
Where do I start when writing a program?
Learning PHP, Ruby, Lua and Python - upcoming courses
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This is a page archived from The Horse's Mouth at http://www.wellho.net/horse/ - the diary and writings of Graham Ellis. Every attempt was made to provide current information at the time the page was written, but things do move forward in our business - new software releases, price changes, new techniques. Please check back via our main site for current courses, prices, versions, etc - any mention of a price in "The Horse's Mouth" cannot be taken as an offer to supply at that price.

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