Exercises, examples and other material relating to training module P404. This topic is presented on public course Using Perl on the Web
How to handle many and multiple form types in a CGI-based Perl program, and how to use the alternative POST method if appropriate. With other extras too, after this module, you'll be writing real, competent applications that handle form inputs and produce a professional, secure, correct response.
Related technical and longer articlesAccessing a MySQL database via a browser, Perl and CGINasty Characters in Web Applications
|Articles and tips on this subject||updated|
|426||Robust checking of data entered by users|
10 steps to testing the bullet proofing user inputs or how to avoid being caught by nasties when your script goes live!
1. Test it works with intended entries. It's not going to be much good if it falls over when someone entered a valid piece of data!
2. Test it works (fails correctly) with erroneous ...
|1365||Korn Shell scripts on the web|
I know that the Korn shell isn't exactly the most common language for web scripting ;-) .... but if you've got a load of Korn shell scripts and a heap of Korn shell experts ... why not?
"How would you do it" I was asked yesterday and I put together a tiny demo to show some of the first principles. ...
|1187||Updating a page strictly every minute (PHP, Perl)|
For the Clock exercise that I mentioned in my last entry, I need to update the page once a minute. Exactly once a minute. At the start of the minute.
I'm using client pull, where the browser asks for the next page - so my basic request is:
<meta http-equiv="refresh" content="60; url=/clock/now.php">
|590||Danny and Donna are getting married|
"Can I write a very quick Perl script to run a wedding list, where items are marked off as bought once someone has put their name against them?". So wrote Danny, hoping to get his online friends to fund large parts of his round the world trip ...
My normal reaction would be to say "look, Danny - if ...
Examples from our training material
PicturesStudying the question and tips
Some modules are available for download
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Topics covered in this module
Returning a location and writing a document.
Returning a location.
Writing a document.
Forms with multiple fields.
Get v Post.
The Environment of a CGI program.
All the element types within a form.
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