queryparametreja

Query parameters, also known as URL parameters or query strings, are a fundamental component of web addresses. They are appended to the end of a URL, following a question mark (?). These parameters are used to pass data from a client, such as a web browser, to a web server. They consist of a series of key-value pairs, where each pair is separated by an ampersand (&). The key and value within a pair are typically separated by an equals sign (=).

For example, in the URL `https://www.example.com/search?query=wiki&page=1`, `query=wiki` and `page=1` are query parameters. Here, `query` and `page` are the keys, and `wiki` and `1` are their respective values. Web servers can then read these parameters to understand what specific information or action the client is requesting.

Query parameters are commonly used for various purposes, including filtering search results, specifying page numbers for pagination, passing user preferences, and tracking the origin of website traffic. They are a stateless mechanism, meaning each request with its parameters is independent of any previous requests. This makes them ideal for simple data transfer and for creating bookmarkable URLs that reflect specific states or views of a web page. Special characters within keys or values are often encoded using URL encoding to ensure proper transmission.