: str_replace(): Passing null to parameter #2 ($replace) of type array|string is deprecated in
namespace YoastSEO_Vendor\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
* 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.,
* 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
* @param string $version HTTP protocol version
public function withProtocolVersion(string $version) : \YoastSEO_Vendor\Psr\Http\Message\MessageInterface;
* Retrieves all message header values.
* The keys represent the header name as it will be sent over the wire, and
* each value is an array of strings associated with the header.
* // Represent the headers as a string
* foreach ($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
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
* @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
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
* 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
* @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).
* @throws \InvalidArgumentException for invalid header names or values.
public function withHeader(string $name, $value) : \YoastSEO_Vendor\Psr\Http\Message\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).
* @throws \InvalidArgumentException for invalid header names or values.
public function withAddedHeader(string $name, $value) : \YoastSEO_Vendor\Psr\Http\Message\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
* @param string $name Case-insensitive header field name to remove.
public function withoutHeader(string $name) : \YoastSEO_Vendor\Psr\Http\Message\MessageInterface;
* Gets the body of the message.
* @return StreamInterface Returns the body as a stream.
public function getBody() : \YoastSEO_Vendor\Psr\Http\Message\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
* @param StreamInterface $body Body.
* @throws \InvalidArgumentException When the body is not valid.
public function withBody(\YoastSEO_Vendor\Psr\Http\Message\StreamInterface $body) : \YoastSEO_Vendor\Psr\Http\Message\MessageInterface;