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META TOPICPARENT |
name="TWikiVariables" |
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
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Notes:
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- URL parameters passed into HTML form fields must be entity ENCODEd.
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- URL parameters passed into HTML form fields must be entity ENCODEd.
Example: <input type="text" name="address" value="%URLPARAM{ "address" encode="entity" }%" />
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- 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.
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- There is a risk that this variable could be misused for cross-site scripting.
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