> For the complete documentation index, see [llms.txt](https://xoops.gitbook.io/xmf-cookbook/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://xoops.gitbook.io/xmf-cookbook/reference/jwt/tokenreader.md). # TokenReader The `Xmf\Jwt\TokenReader` class provides convenience methods to simplify reading JSON Web Tokens. ## TokenReader::fromString(*$key*, *$token*, *$assertClaims*) Validate and decode a JSON Web Token string The *$key* is the key that was used to to sign the token. It may be specified as a [KeyAbstract](/xmf-cookbook/reference/key/keyabstract.md) object, or a key name string that will be used to build a key object using the [KeyFactory](/xmf-cookbook/reference/jwt/keyfactory.md) using a default [FileStorage](/xmf-cookbook/reference/key/filestorage.md) instance for storage. The *$token* is the [JSON Web Token](/xmf-cookbook/reference/jwt/jsonwebtoken.md) string to decode and validate. The *$assertClaims* array specifies application specific public or claims that are verified while decoding. Returns the token payload as stdClass, or false if token was invalid. ## TokenReader::fromCookie(*$key*, *$cookieName*, *$assertClaims*) Extracts a token string from the cookie named by *$cookieName*, and uses `TokenReader::fromString()` to process using the specified *$key* and *$assertClaims*. Returns the token payload as stdClass, or false if token was invalid. ## TokenReader::fromRequest(*$key*, *$attributeName*, *$assertClaims*) Extracts a token string from the cookie named by *$attributeName*, and uses `TokenReader::fromString()` to process using the specified *$key* and *$assertClaims*. Returns the token payload as stdClass, or false if token was invalid. ## TokenReader::fromHeader(*$key*, *$assertClaims*, *$headerName*) Extracts a token string from the cookie named by *$headerName*, and uses `TokenReader::fromString()` to process using the specified *$key* and *$assertClaims*. The header is expected to be an bearer token in the authorization header. The default for *$headerName* should not normally need to be changed. Returns the token payload as stdClass, or false if token was invalid. --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter: ``` GET https://xoops.gitbook.io/xmf-cookbook/reference/jwt/tokenreader.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.