Perl Programming Tutorials

PERL Programming Tutorials And Articles
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Introduction POP3 stands for Post Office Protocol version 3, it's application layer Internet Protocol used by various desktop email clients, and web-based email services to fetch email from a remote server over a TCP/IP connection. Until sometime back POP3 was the de facto standard for email...
Read An Entire File All At Once At times we need to read the contents of a file all at once, instead of reading line by line, or reading the contents line-wise into an array, here's how we can read the contents of a file into a scalar as text. open FILE, '</tmp/page.html' or die $!;...
Introduction We all write programs to run on the terminal to do jobs that take time, like processing logs, sending out newsletter, etc. To know the progress of our task we print some messages to know our program is running well and doing its job. But wouldn't it be nice if we could add a...
JSON has become a popular data representation format, and can been seen as the successor of XML which used to be the most popular format used for data exchange between systems. Notable examples of JSON being used for data representation are Facebook Graph API & Flickr API, amongst many others....
Introduction IRC is a very easy protocol to communicate with once you get the basics. I'll be showing how to create a 'bot' (=robot) in the well-known scripting language Perl. All the commands sent to the server can also be ported to any other programming or scripting language. I will not go...
In rashida.par's Recursive function to find X to the power n ( I see that she intelligently used recursion to find the power of x to n. So, I was wondering whether we can do this iteratively also, I always do that - trying to find a iterative solution...
Many times we require to output the time difference between two dates/time in human readable form like '5 minutes 18 seconds'... Writing a whole subroutine to perform the same can be tiresome and messy, I've written a small subroutine which uses Perl's gmtime function to achieve the same. sub...
Introduction Sanitizing HTML is just removing unwanted HTML elements from any inputted HTML code, it does not validate HTML code. We all have seen many sites which allow you to post comments using only a few HTML elements like <a>, <b>, <i> etc. the other HTML tags are automatically removed,...
Hi friends, This is a very simple example demonstrating how to implement cookies in perl. This File ( sets the cookie- #!/usr/bin/perl use CGI qw(:standard); use CGI::Cookie;
When your script writes to a new file, you probably want it to create a new and unique name for the new file, one that doesn't conflict with any existing files, which would be overwritten. One way to create a new file name that's unique is to incorporate the process id and the time into the name....
Introduction Pagination is a very basic requirement of a web application, in this article we'll see how to implement pagination easily using the Perl module Data::Pageset. Basically there are two types of pagination, Jumping and Sliding. In the jumping type the current page jumps from the...
Many times we need to check whether a number is negative or not, here is a very simple subroutine to do that. sub isNegative { my($checkValue) = @_; if(abs($checkValue) != $checkValue) { # the value is negative return 1; }
How to direct a browser to display a different HTML page This is actually very simple to do in a CGI script. Instead of the usual header Content-type: text/html #make your script print this Location: URL to display #Don't forget the blank line afterwards. -or- print...
There is a function ucwords() in PHP which capitalizes the first letter of each word. <? $str = "programming forums"; $str = ucwords($str); // now $str = "Programming Forums" ?> I have written a sub-routine in Perl, which gives the same functionality.
Hi, Perl has been very famous for providing with very small but very useful programs, especially for the web. Hit Counters are one of such domains. Here is a small perl code to implement a basic hit counter in a web page #!/usr/bin/perl -wT print "Content-type:text/html\n\n"; $log =...
While modern browsers will work around many syntax problems in your HTML, if you want to ensure consistent pages across multiple browsers, it's a good idea to check the syntax. That's where HTML::Lint comes in. We'll show you how to use this powerful syntax-checking tool. Modern browsers...
Well this has been out for quite sometime now, so i thought to share with all out here. Heres a PERL script demonstrating how to retrieve the data from the Google Suggest Drop Down Autocomplete and use it as you please! This was developed by John Bokma , but worked in command line only. So i have...
For my first thread i will post my new twitter bot/rat. This will only work on linux and possibly mac Its more of a funny prank than a rat, but it can be used for malicious purposes. You need to get your victim to open the .pl file on their computer and leave it open, if your using this on...
Everyone knows that Perl is extremely fast when it comes to handling regular expressions and text processing... but have you ever wondered how fast is extremely fast? Well, one of the toys us big kids have at our disposal is the Perl Benchmark module, which lets you test the speed of a Perl script....
Introduction If you're like most people, you probably have a bunch of MP3s scattered around your hard disk. And if you're like most people, you probably also have on your to-do list a plan to inspect and catalog them so that you know exactly what you're listening to. It's just that you...