dbmopen() - Opening DBM Files with Hash Variables

This section describes the built-in funciton, dbmopen(), to open DBM database files with hash variables.

Perl allows us to access DBM database files by binding them to hash objects. There are two related functions:

1. dbmopen() - A function to bind the specified hash variable to the specified DBM file. The specified mask value will be used as the permission code, if the specified DBM file does not exist and need to be created. Of course, previously existing entries of the hash variable will be removed at the time of binding.

rc = dbmopen(hash_variable, dbm_name, mask);

For example, dbmopen(%word, "dictionary", 0666) binds the hash variable %word to the DBM "dictionary".

2. dbmclose() - A function to un-bind the specified hash variable from the bound DBM file.

rc = dbmclose(hash_variable);

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

 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

 Converting Perl Script to Executable Binary

Using DBM Database Files

dbmopen() - Opening DBM Files with Hash Variables

 DBM Database Example - English French Dictionary

 DBM Database Example - Book Records with Multiple Fields

 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

 CGI.pm Module for Building Web Pages

 LWP::UserAgent and Web Site Testing

 References

 PDF Printing Version