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<?php namespace WordPress\AiClientDependencies\Psr\Http\Message; /** * HTTP messages consist of requests from a client to a server and responses * from a server to a client. This interface defines the methods common to * each. * * Messages are considered immutable; all methods that might change state MUST * be implemented such that they retain the internal state of the current * message and return an instance that contains the changed state. * * @link http://www.ietf.org/rfc/rfc7230.txt * @link http://www.ietf.org/rfc/rfc7231.txt / interface MessageInterface { /* * Retrieves the HTTP protocol version as a string. * * The string MUST contain only the HTTP version number (e.g., "1.1", "1.0"). * * @return string HTTP protocol version. / public function getProtocolVersion(): string; /* * Return an instance with the specified HTTP protocol version. * * The version string MUST contain only the HTTP version number (e.g., * "1.1", "1.0"). * * This method MUST be implemented in such a way as to retain the * immutability of the message, and MUST return an instance that has the * new protocol version. * * @param string $version HTTP protocol version * @return static / public function withProtocolVersion(string $version): MessageInterface; /* * Retrieves all message header values. * * The keys represent the header name as it will be sent over the wire, and * each value is an array of strings associated with the header. * * // Represent the headers as a string * foreach ($message->getHeaders() as $name => $values) { * echo $name . ": " . implode(", ", $values); * } * * // Emit headers iteratively: * foreach ($message->getHeaders() as $name => $values) { * foreach ($values as $value) { * header(sprintf('%s: %s', $name, $value), false); * } * } * * While header names are not case-sensitive, getHeaders() will preserve the * exact case in which headers were originally specified. * * @return string[][] Returns an associative array of the message's headers. Each * key MUST be a header name, and each value MUST be an array of strings * for that header. / public function getHeaders(): array; /* * Checks if a header exists by the given case-insensitive name. * * @param string $name Case-insensitive header field name. * @return bool Returns true if any header names match the given header * name using a case-insensitive string comparison. Returns false if * no matching header name is found in the message. / public function hasHeader(string $name): bool; /* * Retrieves a message header value by the given case-insensitive name. * * This method returns an array of all the header values of the given * case-insensitive header name. * * If the header does not appear in the message, this method MUST return an * empty array. * * @param string $name Case-insensitive header field name. * @return string[] An array of string values as provided for the given * header. If the header does not appear in the message, this method MUST * return an empty array. / public function getHeader(string $name): array; /* * Retrieves a comma-separated string of the values for a single header. * * This method returns all of the header values of the given * case-insensitive header name as a string concatenated together using * a comma. * * NOTE: Not all header values may be appropriately represented using * comma concatenation. For such headers, use getHeader() instead * and supply your own delimiter when concatenating. * * If the header does not appear in the message, this method MUST return * an empty string. * * @param string $name Case-insensitive header field name. * @return string A string of values as provided for the given header * concatenated together using a comma. If the header does not appear in * the message, this method MUST return an empty string. / public function getHeaderLine(string $name): string; /* * Return an instance with the provided value replacing the specified header. * * While header names are case-insensitive, the casing of the header will * be preserved by this function, and returned from getHeaders(). * * This method MUST be implemented in such a way as to retain the * immutability of the message, and MUST return an instance that has the * new and/or updated header and value. * * @param string $name Case-insensitive header field name. * @param string\|string[] $value Header value(s). * @return static * @throws \InvalidArgumentException for invalid header names or values. / public function withHeader(string $name, $value): MessageInterface; /* * Return an instance with the specified header appended with the given value. * * Existing values for the specified header will be maintained. The new * value(s) will be appended to the existing list. If the header did not * exist previously, it will be added. * * This method MUST be implemented in such a way as to retain the * immutability of the message, and MUST return an instance that has the * new header and/or value. * * @param string $name Case-insensitive header field name to add. * @param string\|string[] $value Header value(s). * @return static * @throws \InvalidArgumentException for invalid header names or values. / public function withAddedHeader(string $name, $value): MessageInterface; /* * Return an instance without the specified header. * * Header resolution MUST be done without case-sensitivity. * * This method MUST be implemented in such a way as to retain the * immutability of the message, and MUST return an instance that removes * the named header. * * @param string $name Case-insensitive header field name to remove. * @return static / public function withoutHeader(string $name): MessageInterface; /* * Gets the body of the message. * * @return StreamInterface Returns the body as a stream. / public function getBody(): StreamInterface; /* * Return an instance with the specified message body. * * The body MUST be a StreamInterface object. * * This method MUST be implemented in such a way as to retain the * immutability of the message, and MUST return a new instance that has the * new body stream. * * @param StreamInterface $body Body. * @return static * @throws \InvalidArgumentException When the body is not valid. */ public function withBody(StreamInterface $body): MessageInterface; }

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