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.

As mentioned in the previous section, do() function can be used to include script code from another file into the current script file. To try this out, I wrote the following file,, for other script file to include:

#- Copyright (c) All Rights Reserved.
   $author = "Herong Yang";
   print("Printing from\n");
sub myDoSub {
   print("Printing from myDoSub()...\n");

Here is tutorial example of how to use do() function to include script code in

#- Copyright (c) All Rights Reserved.
   print("Printing from\n");
   print("Author = $author\n");

If you run this script, you will get:

Printing from
Printing from
Author = Herong Yang
Printing from myDoSub()...

Table of Contents

 About This Book

 Perl on Linux Systems

 ActivePerl on Windows Systems

 Data Types: Values and Variables

 Expressions, Operations and Simple Statements

 User Defined Subroutines

 Perl Built-in Debugger

Name Spaces and Perl Module Files

 Including Script Codes from Other Files

do() Function - Including Script Files

 require() Function - Including Script Files

 "package" Statement - Switching Name Space

 BEGIN(), CHECK(), INIT() and END() Functions

 Defining Your Own Perl Module - A Sample Perl Module

 Symbolic (or Soft) References

 Hard References - Addresses of Memory Objects

 Objects (or References) and Classes (or Packages)

 Typeglob and Importing Identifiers from Other Packages

 String Built-in Functions and Performance

 File Handles and Data Input/Output

 Open Files in Binary Mode

 Open Directories and Read File Names

 File System Functions and Operations

 Image and Picture Processing

 Using DBM Database Files

 Using MySQL Database Server

 Socket Communication Over the Internet

 XML::Simple Module - XML Parser and Generator

 XML Communication Model

 SOAP::Lite - SOAP Server-Client Communication Module

 Perl Programs as IIS Server CGI Scripts

 CGI (Common Gateway Interface)

 XML-RPC - Remote Procedure Call with XML and HTTP

 RPC::XML - Perl Implementation of XML-RPC

 Integrating Perl with Apache Web Server Module for Building Web Pages

 LWP::UserAgent and Web Site Testing

 Converting Perl Script to Executable Binary

 Managing Perl Engine and Modules on macOS

 Archived Tutorials


 Full Version in PDF/EPUB