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URLPARAM{"name"} -- get value of a URL parameter

• Returns the value of a URL parameter.
• Syntax: %URLPARAM{"name"}%
• Supported parameters:

• Example: %URLPARAM{"skin"}% returns print for a .../view/TWiki/VarURLPARAM?skin=print URL
• Notes:
  • IMPORTANT: There is a risk that this variable can be misused for cross-site scripting (XSS) if the encoding is turned off. The encode="safe" is the default, it provides a safe middle ground. The encode="entity" is more aggressive, but some TWiki applications might not work.
  • URL parameters passed into HTML form fields must be entity ENCODEd.
    Example: <input type="text" name="address" value="%URLPARAM{ "address" encode="entity" }%" />
  • Double quotes in URL parameters must be escaped when passed into other TWiki variables.
    Example: %SEARCH{ "%URLPARAM{ "search" encode="quotes" }%" noheader="on" }%
  • When used in a template topic, this variable will be expanded when the template is used to create a new topic. See TWikiTemplates#TemplateTopicsVars for details.
  • Watch out for TWiki internal parameters, such as rev, skin, template, topic, web; they have a special meaning in TWiki. Common parameters and view script specific parameters are documented at TWikiScripts.
  • If you have %URLPARAM{ in the value of a URL parameter, it will be modified to %<nop>URLPARAM{. This is to prevent an infinite loop during expansion.
• Related: ENCODE, SEARCH, FormattedSearch, QUERYSTRING

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