Perl Tutorials - Herong's Tutorial Examples - v6.01, by Dr. Herong Yang
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
Data Types: Values and Variables
Expressions, Operations and Simple Statements
Name Spaces and Perl Module Files
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 Directories and Read File Names
File System Functions and Operations
►dbmopen() - Opening DBM Files with Hash Variables
DBM Database Example - English French Dictionary
DBM Database Example - Book Records with Multiple Fields
Socket Communication Over the Internet
XML::Simple Module - XML Parser and Generator
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
Converting Perl Script to Executable Binary