Symbols | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z

Index: E

$element, start element name (XML): CGI Gateway to XML Middleware
$expat, reference to XML::Parser object: CGI Gateway to XML Middleware
e-commerce: How CGI Is Used Today
echo command: Format
- Environment Variables
ECMAScript, standardizing JScript/JavaScript language: History
efficiency and optimization, CGI programs: Efficiency and Optimization
- FastCGI, using: FastCGI
- mod_perl, using: mod_perl
- Perl techniques for: Basic Perl Tips, Top Ten
Electronic Frontier Foundation, website search: Writing an XML Parser
element.focus(): Validating elements
elements
- HTML
- - generating with CGI.pm methods: Generating Output with CGI.pm
  - - Standard HTML Elements
- HTML forms
- - Embperl, creating automatically: Form input elements
  - generating with CGI.pm methods: Form Elements
  - name/value associations: Sending Data to the Server
  - validating with JavaScript: Validating elements
  - - Validation example
- quoted, in email addresses: Validating Syntax
- XML
- - attributes, defining: Document Type Definition
  - character data, containing: Document Type Definition
  - tags: Document Type Definition
else command: Format
email: Sending Email
- addresses: Email Addresses
- - overriding senders: Command-Line Options
  - validating (code example): Validating Syntax
  - validating syntax: Validating Syntax
- mailx and mail programs: mailx and mail
- Perl mailers: Perl Mailers
- - Net::SMTP module, sending directly through SMTP: Perl Mailers
- procmail program: procmail
- security: Security
- - false identities: False Identities
  - mailers and shells: Mailers and Shells
- similarity to HTTP message format: HTTP Headers
- spamjunk email (see spam)
- structure of Internet email: Structure of Internet Email
email services, interprocess communication and: Communicating with Other Servers
Embperl module: Embperl
- bracket pairs for blocks of code: Embperl code blocks
- configuration: Configuration
- embpcgi.pl CGI script: embpcgi.pl
- escaping HTML generated by Perl blocks: Embperl handler
- global variables, defining for HTML templates: Global Variables
- Mason module component approach vs.: Component Approach
- meta-commands: Meta-commands
- news, current headlines and articles (example): Example
- tables, automatic contstruction of: HTML Logic
- website: Summary
EMPTY keyword, XML element definitions: Document Type Definition
empty lists: Use strict
enclosing final attribute, SSI: Common Errors
encoding
- Authorization field characters: Authorization
- content negotiation and: Content Negotiation
- content negotiaton, support for: Encoding
- forms
- - application/x-www-form-urlencoded: Sending Data to the Server
  - multipart/form-data: Sending Data to the Server
- space, separating query string arguments: Elements of a URL
- specifying media type for HTTP request: The <FORM> Tag
- tab-delimited data and end-of-line characters: Delimiters
- URLs: URL Encoding
- - Decoding Form Input
encryption: Encryption
ENCTYPE attribute: The <FORM> Tag
__END__ and __DATA__: mod_perl Considerations
END blocks
- mod_perl, treatment of: mod_perl Considerations
- removing temporary filenames: Named temporary files
end-of-file character, operating systems: Running Scripts from the Command Line
end-of-line characters: File Uploads with CGI.pm
- (see also n; newlines)
- binmode function and: binmode
- encoding/decoding, functions for: Delimiters
- tab file delimiters and: Delimiters
- translating to \\\\n: File Uploads with CGI.pm
end_html method (CGI.pm): end_html
endif command: Format
ending bracket pair: Embperl code blocks
ending HTML documents: Starting and Ending Documents
entity tags: ETag
environment, CGI: The Common Gateway Interface
environment variables: Introduction to CGI
- CGI, CGI.pm environment methods and: Environment Information
- CGI scripts: Environment Variables
- - examples of: Sample CGI
- %ENV hash: The Common Gateway Interface
- - Environment Variables
- %env_info hash, naming and describing with: Examining Environment Variables
- generating with env_tmpl.cgi script: Loops
- HTTP_prefix, http method and: http
- HTTPS_, returning with https method: https
- inserting into HTML documents with SSI commands: Environment Variables
- less common CGI environment variables: CGI Environment Variables
- secure servers, adding for secure connections: CGI Environment Variables
- self_url method and: self_url
- SERVER_PROTOCOL: Complete (Non-Parsed) Headers
- servers, listing for: Examining Environment Variables
- setting manually before running scripts: Running Scripts from the Command Line
- SSI pages, available to: Environment Variables
- standard CGI environment variables: CGI Environment Variables
- tainted data, checking for: How Taint Works
- web server administrators, adding to configuration files: CGI Environment Variables
env.tmpl (HTML template): Loops
env_tmpl.cgi script: Loops
equal sign (=)
- name/value pair separator: Elements of a URL
- - Running Scripts from the Command Line
- parameters, passing without: Decoding Form Input
error messages
- cgi_error method, returning: File Uploads with CGI.pm
errors
- 500 Internal Server Error: CGI Output
- - Specifying status codes
- 400-level status code responses and: Specifying status codes
- CGI programs: Common Errors
- - application permissions: Application Permissions
  - Perl coding techniques for avoiding: Perl Coding Techniques
  - pound-bang (#!) line: The Pound-Bang
- common, Server Side Includes: Common Errors
- error messages
- - CGI.pm objects: File Uploads with CGI.pm
  - customizing: Tailoring SSI Output
  - redirecting to browser: Embperl handler
  - - CGI Gateway to XML Middleware
    - Trap die
  - status codes and: Specifying status codes
- handling: Handling Errors
- - CGI::Carp module: CGI::Carp
  - die function: Dying Gracefully
  - error subroutine, exporting: Custom Module
  - subroutines: Error Subroutines
- output to STDERR, handling by servers: STDERR
- Perl and CGI scripts, preventing with strict module: Use strict
- server error logs, checking: Check Error Logs
- server status codes for: The Status Line
- SQL submission: Address tutorial database creation script
- static HTML document for general errors: Check the Client Browser
- system commands, checking status for: Check Status of System Calls
- transfer errors in file uploads: File Uploads with CGI.pm
- XML::Parser module and: CGI Gateway to XML Middleware
escape characters, functions for encoding in text files: Delimiters
escaping
- @ prefix with backslash (\\\\) character: Image Processing
- ~! (tilde escapes), mailx and mail programs: mailx and mail
- backslash (\\\\), using: Delimiters
- characters with quotemeta function: Searching One by One, Take Two
- double quotes with backslash (\\\\): Lots of print Statements
- HTML generated by Perl blocks (Embperl): Embperl handler
- url_escape and url_unescape functions: URL Encoding
ETag (entity tag) field: ETag
eval function, evaluating user-specified regex: Regex-Based Search Engine
event-based parsers: CGI Gateway to XML Middleware
exclusive file locks: flock
exec command: fork and exec
- mail program, using with: mailx and mail
- SSI: Configuration
- - Format
  - exec cgi directive: Executing CGI Programs
- system: The Pound-Bang
ExecCGI option, disabling: Configuring by extension
executable files, CGI scripts as: Invoking CGI Scripts
execute bit: Write Permissions
execute command, starting SQL query with: Database querying
execution
- CGI programs
- - creating separate processes for: Alternatives to CGI
  - disallowing while enabling exec command: Configuration
  - file locking and: flock
  - permissions, turning off for directories: Configuring by extension
  - world access bit, setting for: Application Permissions
- combining with compilation in perl: Why Perl?
- external applications: Configuration
- HTML::Embperl module, Execute function: Execute
- Perl CGI programs, delays caused by interpreter: Efficiency and Optimization
existing solutions to problems, finding: Find Existing Solutions for Your Problems
exit command, use with mod_perl: mod_perl Considerations
expiration time, setting for HTML documents: Caching
Expires headers: An Example
Exporter module, exporting error subroutine with: Custom Module
exporting functions: Standard and Object-Oriented Syntax
expressions: How Taint Works
- (see also regular expressions)
- simple, bracket pairs enclosing (Embperl): Embperl code blocks
- tainted values in: How Taint Works
extensions, HTTP request headers: Cookies
external applications
- calling: Calling External Applications
- - pipes, opening to: Calling External Applications
- executing and including output in HTML documents: Configuration

Symbols | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z