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Index: L

• last date modified
• • Last-modified field: Last-Modified
  • web page, displaying with SSI: Server Side Includes
• LAST_MODIFIED variable: Environment Variables
• • in files including other files: Including Boilerplates
• length, HTTP message content: Content-Length
• • Content-Length
• lexical variables
• • in Embperl module: Variable scope
  • mod_perl, problems with: mod_perl Considerations
• libpng, using with gd: Installation
• libraries, specifying Perl with use statement: Connecting to DBI
• libwww-perl (see LWP)
• line and point charts combination, creating with GD::Graph::linespoints module: GD::Graph
• line charts
• • creating with GD::Graph::lines module: GD::Graph
  • three-dimensional, creating with GD::Graph::lines3d module: GD::Graph3D
• line endings: Check the Client Browser
• • (see also end-of-line characters; newlines)
  • CGI scripts, not matching current system: Line Endings
  • differences in operating systems: Outputting documents
  • newlines end of line character, binmode and: Check the Client Browser
• links
• • appending query strings containing session identifier to: Hidden Fields
  • HTML documents
  • • replacing: Query Strings and Extra Path Information
    • updating another document with: Specifying an alternative target
  • symbolic links, security risks with: Configuring by directory
• list context, scalar context vs.: Date
• lists
• • choices for users: The <SELECT> Tag
  • elements: List elements
  • empty lists, use of: Use strict
  • printing multiple items in: Standard HTML Elements
  • user input, allowed: Security Strategies
• loads.cgi script, plotting average system loads: Using GD
• local function: Standard HTML Elements
• • Localize Variables with my
• local processes as clients: Communicating with Other Servers
• local variables
• • bracket pair enclosing in Embperl: Embperl code blocks
  • declarations, strict mode and: Use strict
• localizing variables: Localize Variables with my
• locating perl, Unix system: The Pound-Bang
• Location header: Location
• • 300-level status responses and: Specifying status codes
  • redirect method, using instead of: Redirection
  • redirecting requests: Forwarding to another URL
• locking files: Embperl handler
• • Locking
  • File Locking
  • flock command, using: flock
  • hash files: DB_File
  • manual lock files: Manual lock files
• logins
• • 401 status code responses, asking for: Specifying status codes
  • resources, restricting with: WWW-Authenticate
  • restricted areas (websites), accessing with: Authorization
• loops
• • creating with HTML::Template: Loops
  • parameters as conditions: Conditionals
• lossless data compression: GIF
• lossy compression algorithm, use in JPEG format: JPEG
• lowercase index, creating: Inverted Index Search
• LWP module: Trusting the Browser
• • LWP
  • CGI Gateway to XML Middleware
• LWP::Simple module: LWP
• • CGI Gateway to XML Middleware
  • get subroutine: CGI Gateway to XML Middleware
• LZW compression algorithm: GIF

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