VAR{"NAME" ...} -- get a preference value from another web or topic and more

• Gets the value of a variable in various manners.
  • If the topic parameter is specified, it gets the value of the specified preferences variable in the specified topic. Please note that the WebPreferences of the web of the specified topic is not examined. So the returned value may not be the same as the value of the variable when the specified topic is viewed.
  • If the topic parameter is not specified and the web parameter is specified, it gets the value of the specified preferences variable in the specified web, which means the specified web's WebPreferences is examined for the variable.
  • If the neither the topic nor web parameter is specified, it gets the value of the specified variable in the current context -- the variable can either be a preferences variable or a session variable but cannot be a tag with a tag handler (e.g. %GMTIME%).
    %VAR{"NAME"}% is similar to %NAME%, but they differ if NAME is undefined, in which case %VAR{"NAME"}% is expanded to null (zero width string) while %NAME% remains as is (%NAME%). %VAR{"NAME"}% yields the same value as %IF{"defined NAME" then="$percntNAME$percnt"}% if NAME is a variable, but the latter is cubmersome.
• Syntax: %VAR{"NAME" ...}%
• Supported parameters:

• Example 1: To get the members of TWikiAdminGroup, %VAR{"GROUP" topic="%USERSWEB%.TWikiAdminGroup"}%, which expands to TWikiAdminUser, RfoLnx4sam.
• Example 2: To get %WEBBGCOLOR% of the Main web write %VAR{"WEBBGCOLOR" web="Main"}%, which expands to #FFEFA6
• Example 3: Let's say you are writing the "foo" skin. And you want to have the users specify a string inserted in the head tag with FOOSKIN_HTML_HEAD_HOOK. That can be achived by the following:
  %VARVAL{"FOOSKIN_HTML_HEAD_HOOK" default="<nop>" ignorenull="on"}%
• Category: DevelopmentVariables, SystemInformationVariables
• Related: ALLVARIABLES, WEBPREFSTOPIC