ENCODE{string} -- encode a string to URL or HTML entities

• Encode "special" characters to HTML numeric entities or to URL entities.
• Encoded characters:
  • all non-printable ASCII characters below space, except newline ("\n") and linefeed ("\r")
  • HTML special characters "<", ">", "&", single quote (') and double quote (")
  • TWiki special characters "%", "[", "]", "@", "_", "*", "=" and "|"
• Syntax: %ENCODE{"string"}%
• Supported parameters:

• Examples:
  • %ENCODE{"spaced name"}% expands to spaced%20name
  • %ENCODE{"spaced name" type="entity" extra=" "}% expands to spaced name
• Notes:
  • Values of HTML input fields should be encoded as "html". A shorter %ENTITY{any text}% can be used instead of the more verbose %ENCODE{ "any text" type="html" }%.
    Example: <input type="text" name="address" value="%ENTITY{any text}%" />
  • Double quotes in strings must be escaped when passed into other TWiki variables.
    Example: %SEARCH{ "%ENCODE{ "string with "quotes"" type="quotes" }%" noheader="on" }%
  • Use type="moderate", type="safe", type="entity" or type="html" to protect user input from URL parameters and external sources against cross-site scripting (XSS). type="html" is the safest mode, but some TWiki applications might not work. type="safe" provides a safe middle ground, type="moderate" provides only moderate cross-site scripting protection.
• Category: ApplicationsAndComponentsVariables, DevelopmentVariables, ExportAndPublishingVariables
• Related: ENTITY, FORMFIELD, QUERYPARAMS, URLPARAM