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Index: L

last date modified

Last-modified field: 2.4.2.6. Last-Modified

web page, displaying with SSI: 6.2. Server Side Includes

LAST_MODIFIED variable: 6.2.3. Environment Variables

in files including other files: 6.2.5. Including Boilerplates

length, HTTP message content: 2.3.2.2. Content-Length

2.4.2.2. Content-Length

lexical variables

in Embperl module: 6.4.2.2. Variable scope

mod_perl, problems with: 17.3.2. mod_perl Considerations

libpng, using with gd: 13.3.1. Installation

libraries, specifying Perl with use statement: 10.4.1.1. Connecting to DBI

libwww-perl (see LWP)

line and point charts combination, creating with GD::Graph::linespoints module: 13.4.2. GD::Graph

line charts

creating with GD::Graph::lines module: 13.4.2. GD::Graph

three-dimensional, creating with GD::Graph::lines3d module: 13.4.3. GD::Graph3D

line endings: 3.4.1. Check the Client Browser

(see also end-of-line characters; newlines)

CGI scripts, not matching current system: 15.1.3. Line Endings

differences in operating systems: 3.3.1.1. Outputting documents

newlines end of line character, binmode and: 3.4.1. Check the Client Browser

links

appending query strings containing session identifier to: 11.2. Hidden Fields

HTML documents

replacing: 11.1. Query Strings and Extra Path Information

updating another document with: 5.3.1.4. Specifying an alternative target

symbolic links, security risks with: 1.4.1.1. Configuring by directory

list context, scalar context vs.: 2.4.2.4. Date

lists

choices for users: 4.2.4. The <SELECT> Tag

elements: 6.4.3.2. List elements

empty lists, use of: 15.2.1. Use strict

printing multiple items in: 5.3.3. Standard HTML Elements

user input, allowed: 8.2.3. Security Strategies

loads.cgi script, plotting average system loads: 13.3.2. Using GD

local function: 5.3.3. Standard HTML Elements

17.1.3. Localize Variables with my

local processes as clients: 14.1. Communicating with Other Servers

local variables

bracket pair enclosing in Embperl: 6.4.2.1. Embperl code blocks

declarations, strict mode and: 15.2.1. Use strict

localizing variables: 17.1.3. Localize Variables with my

locating perl, Unix system: 15.1.2. The Pound-Bang

Location header: 2.4.2.7. Location

300-level status responses and: 3.3.1.3. Specifying status codes

redirect method, using instead of: 5.3.1.5. Redirection

redirecting requests: 3.3.1.2. Forwarding to another URL

locking files: 6.4.5.1. Embperl handler

10.1.1. Locking

15.2.5. File Locking

flock command, using: 10.1.1.1. flock

hash files: 10.2.1. DB_File

manual lock files: 10.1.1.2. Manual lock files

logins

401 status code responses, asking for: 3.3.1.3. Specifying status codes

resources, restricting with: 2.4.2.10. WWW-Authenticate

restricted areas (websites), accessing with: 2.3.2.4. Authorization

loops

creating with HTML::Template: 6.3.1.1. Loops

parameters as conditions: 6.3.1.2. Conditionals

lossless data compression: 13.1.1. GIF

lossy compression algorithm, use in JPEG format: 13.1.3. JPEG

lowercase index, creating: 12.3. Inverted Index Search

LWP module: 8.2.5. Trusting the Browser

14.1.3. LWP

14.5. CGI Gateway to XML Middleware

LWP::Simple module: 14.1.3. LWP

14.5. CGI Gateway to XML Middleware

get subroutine: 14.5. CGI Gateway to XML Middleware

LZW compression algorithm: 13.1.1. GIF

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