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Index: D

• $db, using: DB_File
• daemon, turning Perl CGI application into: Efficiency and Optimization
• dash (-) or period (.), starting filenames with: File Uploads with CGI.pm
• • File Uploads with CGI.pm
• data collection, forms: Forms and CGI
• data exchange, performing with JavaScript: Data Exchange
• • online music browser (example): Example
  • WDDX: WDDX
• data modification result screens (various): Address tutorial CGI script
• data storage, security issues: Data Storage
• • dynamic filenames: Dynamic Filenames
  • file permissions: File Permissions
  • location of files: Location of Files
• data types: WDDX
• • (see also arrays; hashes; scalars)
  • characters, padding fields for: Creating a Database
  • data structures, printing with Data::Dumper module: Dumping Variables
  • Perl vs. WDDX: WDDX
  • strict variables, Perl language and: Why Perl?
  • WDDX, summary of: WDDX
• databases
• • consolidating with CGI middleware: Middleware and XML
  • creating: Creating a Database
  • • accessing data: Accessing Data
    • inserting data: Inserting Data
  • DBI
  • • connecting to: Connecting to DBI
    • manipulation of: Database manipulation
    • querying: Database querying
  • deleting data from: Deleting Data
  • files, untying from hash tables: DB_File
  • handles to: Address tutorial CGI script
  • perl, linking with: DBI
  • updating: Updating Data
• Data::Dumper module: MLDBM
• • Dumping Variables
• Date field: Date
• DATE_GMT variable: Environment Variables
• • Environment Variables
• DATE_LOCAL variable: Environment Variables
• • Environment Variables
• dates and times
• • current, template file: Syntax
  • customizing display with SSI config command: Tailoring SSI Output
  • formatting with SSI: Tailoring SSI Output
  • last date modified, displaying with SSI: Server Side Includes
  • last modification of requested resource: Last-Modified
• DB_CACHE constant: Inverted Index Search
• DBD::CSV module: DBD::CSV
• • DBI driver, using: Using DBI
  • text files, storing data in: Separating Storage from Your Primary Code
• DBD::Oracle driver: Separating Storage from Your Primary Code
• DB_File module: DBM Files
• • DB_File
  • DESTROY method: DB_File
  • index, creating and storing with: Inverted Index Search
  • using with MLDBM to lock DBM file: MLDBM
• DBI (Database Independent Interface): DBI
• • address tutorial, creating: DBI Address Book
  • • address table: Address tutorial database creation script
    • address table, creating: Address tutorial database creation script
    • CGI script for querying and modifying data: Address tutorial CGI script
  • database, connecting to: Connecting to DBI
  • database manipulation: Database manipulation
  • using: Using DBI
• DBI module: Separating Storage from Your Primary Code
• DBI::CSV module: DBD::CSV
• DBM files: Data Persistence
• • DBM Files
  • locking, using MLDBM with DB_File: MLDBM
  • MLDBM module, saving and retrieving as Perl with: MLDBM
• debugging
• • CGI programs: Debugging CGI Applications
  • • -debug pragma, use with CGI.pm: Running Scripts from the Command Line
    • commands, summary of: The Perl debugger
    • common errors: Common Errors
    • debugging tools: Debugging Tools
    • Perl coding techniques for error avoidance: Perl Coding Techniques
  • echoing errors to browser, use of: CGI Gateway to XML Middleware
  • errors in CGI scripts with STDERR output: STDERR
• declarations
• • global variables: Address tutorial CGI script
  • variables, using strict mode: Use strict
• decoding HTML form input: Decoding Form Input
• decoding tab-delimited data and end-of-line characters: Delimiters
• default installation paths (Apache web server): Web Server Configuration
• DELETE method: PUT and DELETE
• delete query screen: Address tutorial CGI script
• deleting from databases: Deleting Data
• deleting parameters: Modifying parameters
• delimiters
• • ampersand ( & ), key-value pairs: Sending Data to the Server
  • CSV text files: Using DBI
  • qq// operator, use with: Here Documents
  • text files, use in: Delimiters
  • • tabs: Delimiters
• Devel-ptkdb, PerlTk debugger: ptkdb
• development, CGI programs
• • architectural guidelines: Architectural Guidelines
  • • configuration, separating from primary code: Separate Configuration from Your Primary Code
    • directories, organizing projects with: Use Directories to Organize Your Projects
    • display, separating from primary code: Separating Display from Your Primary Code
    • growth, planning for: Plan for Future Growth
    • relative URLs, using: Use Relative URLs
    • scripts, number per application: Number of Scripts per Application
    • storage, separating from primary code: Separating Storage from Your Primary Code
    • submit buttons, controlling flow with: Using Submit Buttons to Control Flow
  • coding guidelines: Coding Guidelines
• development web server, sharing by developers: Plan for Future Growth
• Devel::SawAmpersand module: Regular Expressions
• die function: CGI::Carp
• • calls, catching and sending to browser: Embperl handler
  • trapping: Trapping die
  • triggering 500 Internal Server Error: Trap die
• Digest::MD5 module: MD5
• digests, generating to validate input data: Encryption
• Digest::SHA1 module: SHA-1
• directories
• • CGI scripts, current working directory: The CGI Environment
  • enabling SSI for: Configuration
  • execute permissions (CGI), turning off: Configuring by extension
  • files, listing with glob notation: Avoid the Shell
  • fonts, specifying with FONTS_DIR constant: Image Processing
  • GD/Graph directory: GD::Graph3D
  • opendir function: Searching One by One, Take Two
  • organizing projects with: Use Directories to Organize Your Projects
  • site_perl directory, saving error module in: Custom Module
  • size, calculating with dir_size subroutine: File Uploads with CGI.pm
  • upload directory, setting MAX_DIR_SIZE: File Uploads with CGI.pm
  • URL paths for CGI scripts, mapping to: Elements of a URL
  • world access to: Application Permissions
  • write permission, Unix systems: Write Permissions
• directory and file structure
• • Apache server: Web Server Configuration
  • • CGI scripts, configuring by file name extensions: Configuring by extension
    • creating directory for CGI scripts: Configuring CGI Scripts
• directory tree on web server, separate for web developers: Plan for Future Growth
• DirectoryIndex directive, adding to httpd.conf: Configuration
• disabling caching with header method (-expires argument): Caching
• display, separating from primary code: Separating Display from Your Primary Code
• do method on database handle, creating table with: Address tutorial database creation script
• Document Object Model (DOM): History
• document root (servers), separating from CGI script directory: Configuring by directory
• document type definitions (see DTDs)
• documentation
• • code, standards for: Coding Guidelines
  • Perl viewer for: perldoc
• DOCUMENT_NAME variable: Environment Variables
• documents
• • CGI scripts, outputting: Outputting documents
  • HTML
  • • expiration time, setting: Caching
    • starting and ending: Starting and Ending Documents
  • media types
  • • declaring in HTTP headers: Sample CGI
    • listing in web server response header: Introduction to CGI
• DOCUMENT_URI variable: Environment Variables
• domain names
• • multiple, mapped to one IP address: Host
  • remote machine, obtaining from environment variables: Sample CGI
  • in URLs: Elements of a URL
• double quotes: Sample CGI
• • (see also quotes; single quotes)
  • enclosing "here" documents in: Sample CGI
  • escaping with backslash (\\\\) in HTML: Lots of print Statements
  • strings, @ character in: Image Processing
• drawing primitives (gd): Using GD
• drivers, databases: DBI
• • DBD::CSV DBI driver, using: Using DBI
  • DBD::CSV, loading: Connecting to DBI
  • DBD::Oracle: Separating Storage from Your Primary Code
• drop-down menus: The <SELECT> Tag
• drop shadow
• • adding to text banner: Image Processing
  • moving horizontally and vertically: Image Processing
• DTDs (document type definitions): Document Type Definition
• • defining for data validation: An Introduction to XML
  • optional nature of: Document Type Definition
  • web page information on: CGI Gateway to XML Middleware
• dumping variables to browser for checking: Dumping Variables
• dynamic content, problems with caching: Caching
• dynamic filenames, security risks: Dynamic Filenames
• dynamic images
• • generating: Creating Graphics on the Fly
• dynamic images in HTML: Including Dynamic Images in HTML
• dynamic information, HTML documents
• • access counters: Executing CGI Programs
  • creating with SSI: Server Side Includes
• dynamic resources, CGI support of: How CGI Is Used Today
• dynamic text banners, embedding in static HTML documents: Image Processing

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