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A query string is a part of a uniform resource locator (URL) that assigns values to specified parameters. A query string commonly includes fields added to a base URL by a Web browser or other client application, for example as part of an HTML document, choosing the appearance of a page, or jumping to positions in multimedia content.
Say while on some web page, you decide to research, at Wikipedia, material on that web page. You change your web-search box to "Wikipedia (en)", and enter the page name or the query while on that web page. The other example is that you decide to contribute information from the web to Wikipedia.
As part of a GET request, some data can be passed within the URL's query string, specifying (for example) search terms, date ranges, or other information that defines the query. As part of a POST request, an arbitrary amount of data of any type can be sent to the server in the body of the request message.
For example, a space must be replaced by %20 (this can be done using the PATH option of the {{urlencode:}} parser function). This list is incomplete ; you can help by adding missing items . sp
A URL will often comprise a path, script name, and query string.The query string parameters dictate the content to show on the page, and frequently include information opaque or irrelevant to users—such as internal numeric identifiers for values in a database, illegibly encoded data, session IDs, implementation details, and so on.
prefix:namespace: string filters a namespace down to one or more pages where string matches the pagename's beginning characters. [16] For example, prefix:help:t finds Help pagenames that begin with "T". When the string has zero characters all pages in the given namespace are found.
For example, to append action=edit to a URL query string you could use [{{fullurl:Help:Link|action=history}} this page's history], which renders as this page's history. Note that this will render as an external link rather than as an internal link and for this reason it might not appear in what-links-here queries associated with the target page.
The URI scheme, such as http or ftp, and which generally specifies the protocol, determines the format of the rest of the string. Browsers also implement javascript: URIs that to a parser is just like any other URI. The browser recognizes the specified javascript scheme and treats the rest of the string as a JavaScript program which is then ...