Representation of an incoming, server-side HTTP request.
Per the HTTP specification, this interface includes properties for each of
the following:
- Protocol version
- HTTP method
- URI
- Headers
- Message body
Additionally, it encapsulates all data as it has arrived to the application
from the CGI and/or PHP environment, including:
- The values represented in $_SERVER.
- Any cookies provided (generally via $_COOKIE)
- Query string arguments (generally via $_GET, or as parsed via
parse_str())
- Upload files, if any (as represented by $_FILES)
- Deserialized body parameters (generally from $_POST)
$_SERVER values MUST be treated as immutable, as they represent application
state at the time of request; as such, no methods are provided to allow
modification of those values. The other values provide such methods, as they can
be restored from $_SERVER or the request body, and may need treatment during the
application (e.g., body parameters may be deserialized based on content
type).
Additionally, this interface recognizes the utility of introspecting a
request to derive and match additional parameters (e.g., via URI path matching,
decrypting cookie values, deserializing non-form-encoded body content, matching
authorization headers to users, etc). These parameters are stored in an
"attributes" property.
Requests 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.
Methods summary
public
array
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#
getServerParams( )
Retrieve server parameters.
Retrieve server parameters.
Retrieves data related to the incoming request environment, typically derived
from PHP's $_SERVER superglobal. The data IS NOT REQUIRED to originate from
$_SERVER.
Returns
array
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public
array
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#
getCookieParams( )
Retrieve cookies.
Retrieves cookies sent by the client to the server.
The data MUST be compatible with the structure of the $_COOKIE
superglobal.
Returns
array
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public
static
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#
withCookieParams( array $cookies )
Return an instance with the specified cookies.
Return an instance with the specified cookies.
The data IS NOT REQUIRED to come from the $_COOKIE superglobal, but MUST be
compatible with the structure of $_COOKIE. Typically, this data will be injected
at instantiation.
This method MUST NOT update the related Cookie header of the request
instance, nor related values in the server params.
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 updated cookie
values.
Parameters
- $cookies
array $cookies Array of key/value pairs representing cookies.
Returns
static
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public
array
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#
getQueryParams( )
Retrieve query string arguments.
Retrieve query string arguments.
Retrieves the deserialized query string arguments, if any.
Note: the query params might not be in sync with the URI or server params. If
you need to ensure you are only getting the original values, you may need to
parse the query string from getUri()->getQuery() or from the
QUERY_STRING server param.
Returns
array
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public
static
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#
withQueryParams( array $query )
Return an instance with the specified query string arguments.
Return an instance with the specified query string arguments.
These values SHOULD remain immutable over the course of the incoming request.
They MAY be injected during instantiation, such as from PHP's $_GET superglobal,
or MAY be derived from some other value such as the URI. In cases where the
arguments are parsed from the URI, the data MUST be compatible with what PHP's
parse_str() would return for purposes of how duplicate query parameters are
handled, and how nested sets are handled.
Setting query string arguments MUST NOT change the URI stored by the request,
nor the values in the server params.
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 updated query string
arguments.
Parameters
- $query
array $query Array of query string arguments, typically from $_GET.
Returns
static
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public
array
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#
getUploadedFiles( )
Retrieve normalized file upload data.
Retrieve normalized file upload data.
This method returns upload metadata in a normalized tree, with each leaf an
instance of Psr\Http\Message\UploadedFileInterface.
These values MAY be prepared from $_FILES or the message body during
instantiation, or MAY be injected via withUploadedFiles().
Returns
array An array tree of UploadedFileInterface instances; an empty array MUST be
returned if no data is present.
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public
static
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#
withUploadedFiles( array $uploadedFiles )
Create a new instance with the specified uploaded files.
Create a new instance with the specified uploaded files.
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 updated body
parameters.
Parameters
- $uploadedFiles
array $uploadedFiles An array tree of UploadedFileInterface instances.
Returns
static
Throws
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public
null|array|object
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#
getParsedBody( )
Retrieve any parameters provided in the request body.
Retrieve any parameters provided in the request body.
If the request Content-Type is either application/x-www-form-urlencoded or
multipart/form-data, and the request method is POST, this method MUST return the
contents of $_POST.
Otherwise, this method may return any results of deserializing the request
body content; as parsing returns structured content, the potential types MUST be
arrays or objects only. A null value indicates the absence of body content.
Returns
null|array|object The deserialized body parameters, if any. These will typically be an array or
object.
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public
static
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#
withParsedBody( null|array|object $data )
Return an instance with the specified body parameters.
Return an instance with the specified body parameters.
These MAY be injected during instantiation.
If the request Content-Type is either application/x-www-form-urlencoded or
multipart/form-data, and the request method is POST, use this method ONLY to
inject the contents of $_POST.
The data IS NOT REQUIRED to come from $_POST, but MUST be the results of
deserializing the request body content. Deserialization/parsing returns
structured data, and, as such, this method ONLY accepts arrays or objects, or a
null value if nothing was available to parse.
As an example, if content negotiation determines that the request data is a
JSON payload, this method could be used to create a request instance with the
deserialized parameters.
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 updated body
parameters.
Parameters
- $data
null|array|object $data The deserialized body data. This will typically be in an array or object.
Returns
static
Throws
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public
array
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#
getAttributes( )
Retrieve attributes derived from the request.
Retrieve attributes derived from the request.
The request "attributes" may be used to allow injection of any parameters
derived from the request: e.g., the results of path match operations; the
results of decrypting cookies; the results of deserializing non-form-encoded
message bodies; etc. Attributes will be application and request specific, and
CAN be mutable.
Returns
array Attributes derived from the request.
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public
mixed
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#
getAttribute( string $name, mixed $default = null )
Retrieve a single derived request attribute.
Retrieve a single derived request attribute.
Retrieves a single derived request attribute as described in getAttributes().
If the attribute has not been previously set, returns the default value as
provided.
This method obviates the need for a hasAttribute() method, as it allows
specifying a default value to return if the attribute is not found.
Parameters
- $name
string $name The attribute name.
- $default
mixed $default Default value to return if the attribute does not exist.
Returns
mixed
See
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public
static
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#
withAttribute( string $name, mixed $value )
Return an instance with the specified derived request attribute.
Return an instance with the specified derived request attribute.
This method allows setting a single derived request attribute as described in
getAttributes().
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 updated attribute.
Parameters
- $name
string $name The attribute name.
- $value
mixed $value The value of the attribute.
Returns
static
See
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public
static
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#
withoutAttribute( string $name )
Return an instance that removes the specified derived request attribute.
Return an instance that removes the specified derived request attribute.
This method allows removing a single derived request attribute as described
in getAttributes().
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 attribute.
Parameters
- $name
string $name The attribute name.
Returns
static
See
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