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URLPARAM{"name"} -- get value of a URL parameter
- Returns the value of a URL parameter.
- Syntax:
%URLPARAM{"name"}%
- Supported parameters:
| Parameter: | Description: | Default: |
"name" | The name of a URL parameter | required |
default="..." | Default value in case parameter is empty or missing | empty string |
newline="<br />" | Convert newlines in textarea to other delimiters | no conversion |
encode="entity" | Encode special characters into HTML entities. See ENCODE for more details. | no encoding |
encode="url" | Encode special characters for URL parameter use, like a double quote into %22 | no encoding |
encode="quote" | Escape double quotes with backslashes (\"), does not change other characters; required when feeding URL parameters into other TWiki variables | no encoding |
multiple="on"
multiple="[[$item]]" | If set, gets all selected elements of a <select multiple="multiple"> tag. A format can be specified, with $item indicating the element, e.g. multiple="Option: $item" | first element |
separator=", " | Separator between multiple selections. Only relevant if multiple is specified | "\n" (new line) |
- Example:
%URLPARAM{"skin"}% returns print for a .../view/TWiki/VarURLPARAM?skin=print URL
-
Notes:
- URL parameters passed into HTML form fields must be entity ENCODEd.
- 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 TWiki Templates#Template Topics Vars 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 TWiki Scripts.
- 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.
- There is a risk that this variable could be misused for cross-site scripting.
- Related: ENCODE, SEARCH, Formatted Search, QUERYSTRING