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Debugging Tutorial Session
This section provides a debugging tutorial session to investigate a script by setting break points, stepping through each statement, printing variable values.
2022-11-09, ∼141🔥, 0💬

Retrieving Environment and Script Information
This section provides a tutorial example on how to retrieve information about the Web server environment and about the current CGI script file.
2022-11-06, ∼149🔥, 0💬

XML-RPC - Remote Procedure Call with XML and HTTP
This chapter provides tutorial examples and notes on XML-RPC. Topics include XML-RPC specifications; defining RPC calls as XML messages; sending RPC calls as HTTP requests; defining returning values as XML messages; receiving returning values as HTTP responses.
2022-11-06, ∼205🔥, 0💬

Sending a Remote Method Call as a HTTP Request
This section describes how a remote method call XML message can be delivered to the remote machine as a HTTP request. Extra request head lines are used.
2022-11-06, ∼159🔥, 0💬

Built-in Functions to Work with the File System
This section describes Perl built-in functions, chdir(), mkdir(), rmdir(), and unlink() to work with the file system, like to change the current directory, make or remove a directory, or delete a file.
2022-11-04, ∼144🔥, 0💬

Archived: Install ActivePerl v5.18.1 on Windows Systems
This section provides a tutorial example on how to install ActivePerl v5.18.1 on a Windows 7 system.
2022-11-04, ∼145🔥, 0💬

Install Imager::File::PNG Manually
This section provides a tutorial example on how to install Imager::File::PNG Perl module manually from source code files on macOS. Installation failed with wrong architecture in LIBPNG library.
2022-11-03, ∼158🔥, 0💬

What Is XML-RPC?
This section describes what is XML-RPC - a specification on how to make a Remote Procedure call (RPC) by passing XML messages using HTTP requests and responses over the Internet.
2022-11-02, ∼154🔥, 0💬

What Is Socket Communication?
This section describes the socket communication model on the Internet network. A socket represents one end-point of a two-way communication link between two programs running on the Internet network.
2022-11-02, ∼193🔥, 0💬

CGI (Common Gateway Interface)
This chapter provides tutorial examples and notes on CGI (Common Gateway Interface). Topics include CGI protocol specifications; environment variables provided by IIS; CGI query string; CGI example program.
2022-11-02, ∼169🔥, 0💬

Variables - Scalar, Array and Hash
This section describes Perl variable types: Scalar, Array, and Hash. Variable names must be prefixed with special symbols to indicate their types, $, @ and %.
2022-11-02, ∼155🔥, 0💬

do() Function - Including Script Files
This section provides a tutorial example on how to use do() function to include script code from another file into the current script file.
2022-11-01, ∼165🔥, 0💬

Imager - Convert Image File Format
This section provides a tutorial example on how to convert image file from one format to another format using read() and write() functions from the Perl Imager module.
2022-10-31, ∼189🔥, 0💬

Commonly Used Debugging Commands
This section describes how to run the Perl built-in debugger with the 'perl -d' option. Commonly used debugging commands are also provided.
2022-10-31, ∼162🔥, 0💬

Data Types: Values and Variables
This chapter provides tutorial examples and notes about data types: values and variables. Topics include scalar and list value constructors; scalar value interpretations; scalar, array and hash variables; undef value and undefined variables.
2022-10-31, ∼160🔥, 0💬

List Value Constructors
This section describes what is a list value constructor, a list of scalar values separated by commas. Elements of a list value can be accessed with the subscription notation [i].
2022-10-31, ∼152🔥, 0💬

Installing Database Module for MySQL
This section provides a tutorial example on how to install Perl modules to access MySQL database server with Perl scripts.
2022-10-29, ∼184🔥, 0💬

Socket Communication Over the Internet
This chapter provides tutorial examples and notes on socket communication. Topics include the socket communication interface model; built-in functions for socket communication server and client; using listen() and accept() functions to play the server role; using connect() to play the client role.
2022-10-28, ∼178🔥, 0💬

gethostbyaddr() - Network Utility Functions
This section provides a tutorial example on how to use network utility functions to get default port numbers of standard network services, or get the host name on the network by a given IP address.
2022-10-28, ∼175🔥, 0💬

Simple Statements and Modifiers
This section describes simple statements - an expression terminated with semicolon. Simple statements can have modifiers: if, unless, while, until, foreach.
2022-10-26, ∼152🔥, 0💬

Install Xcode Command Line Tools
This section provides a tutorial on how to install Xcode Command Line Tools, which is required to install Perl add-on modules on macOS.
2022-10-25, ∼162🔥, 0💬

SubParamList.pl - Example on Parameter List
This section provides a tutorial example on how the parameter list is passed to and received in a user defined subroutine by the local array variable @_.
2022-10-24, ∼151🔥, 0💬

Performance of Perl substr() and index()
This section provides a tutorial example to test performance of 2 Perl built-in functions: substr() and index() on a Window 2000 system.
2022-10-24, ∼154🔥, 0💬

ReverseEchoer.pl - A Simple Socket Server Program
This section provides a tutorial example on how to write a simple socket communication server program, ReverseEchoer.pl, which listens and accepts for any client requests.
2022-10-24, ∼160🔥, 0💬

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