SDK for PHP 3.x

AppendStream
in package
implements StreamInterface

FinalYes

Reads from multiple streams, one after the other.

This is a read-only stream decorator.

Table of Contents

Interfaces

StreamInterface
Describes a data stream.

Methods

__construct()  : mixed
__toString()  : string
Reads all data from the stream into a string, from the beginning to end.
addStream()  : void
Add a stream to the AppendStream
close()  : void
Closes each attached stream.
detach()  : resource|null
Detaches each attached stream.
eof()  : bool
Returns true if the stream is at the end of the stream.
getContents()  : string
Returns the remaining contents in a string
getMetadata()  : mixed
Get stream metadata as an associative array or retrieve a specific key.
getSize()  : int|null
Tries to calculate the size by adding the size of each stream.
isReadable()  : bool
Returns whether or not the stream is readable.
isSeekable()  : bool
Returns whether or not the stream is seekable.
isWritable()  : bool
Returns whether or not the stream is writable.
read()  : string
Reads from all of the appended streams until the length is met or EOF.
rewind()  : void
Seek to the beginning of the stream.
seek()  : void
Attempts to seek to the given position. Only supports SEEK_SET.
tell()  : int
Returns the current position of the file read/write pointer
write()  : int
Write data to the stream.

Methods

__construct()

public __construct([array<string|int, StreamInterface> $streams = [] ]) : mixed
Parameters
$streams : array<string|int, StreamInterface> = []

Streams to decorate. Each stream must be readable.

__toString()

Reads all data from the stream into a string, from the beginning to end.

public __toString() : string

This method MUST attempt to seek to the beginning of the stream before reading data and read the stream until the end is reached.

Warning: This could attempt to load a large amount of data into memory.

This method MUST NOT raise an exception in order to conform with PHP's string casting operations.

Return values
string

addStream()

Add a stream to the AppendStream

public addStream(StreamInterface $stream) : void
Parameters
$stream : StreamInterface

Stream to append. Must be readable.

Tags
throws
InvalidArgumentException

if the stream is not readable

close()

Closes each attached stream.

public close() : void

detach()

Detaches each attached stream.

public detach() : resource|null

Returns null as it's not clear which underlying stream resource to return.

Return values
resource|null —

Underlying PHP stream, if any

eof()

Returns true if the stream is at the end of the stream.

public eof() : bool
Return values
bool

getContents()

Returns the remaining contents in a string

public getContents() : string
Return values
string

getMetadata()

Get stream metadata as an associative array or retrieve a specific key.

public getMetadata([mixed $key = null ]) : mixed
Parameters
$key : mixed = null

Specific metadata to retrieve.

getSize()

Tries to calculate the size by adding the size of each stream.

public getSize() : int|null

If any of the streams do not return a valid number, then the size of the append stream cannot be determined and null is returned.

Return values
int|null —

Returns the size in bytes if known, or null if unknown.

isReadable()

Returns whether or not the stream is readable.

public isReadable() : bool
Return values
bool

isSeekable()

Returns whether or not the stream is seekable.

public isSeekable() : bool
Return values
bool

isWritable()

Returns whether or not the stream is writable.

public isWritable() : bool
Return values
bool

read()

Reads from all of the appended streams until the length is met or EOF.

public read(mixed $length) : string
Parameters
$length : mixed

Read up to $length bytes from the object and return them. Fewer than $length bytes may be returned if underlying stream call returns fewer bytes.

Return values
string —

Returns the data read from the stream, or an empty string if no bytes are available.

rewind()

Seek to the beginning of the stream.

public rewind() : void

If the stream is not seekable, this method will raise an exception; otherwise, it will perform a seek(0).

seek()

Attempts to seek to the given position. Only supports SEEK_SET.

public seek(mixed $offset[, mixed $whence = SEEK_SET ]) : void
Parameters
$offset : mixed

Stream offset

$whence : mixed = SEEK_SET

Specifies how the cursor position will be calculated based on the seek offset. Valid values are identical to the built-in PHP $whence values for fseek(). SEEK_SET: Set position equal to offset bytes SEEK_CUR: Set position to current location plus offset SEEK_END: Set position to end-of-stream plus offset.

tell()

Returns the current position of the file read/write pointer

public tell() : int
Return values
int —

Position of the file pointer

write()

Write data to the stream.

public write(mixed $string) : int
Parameters
$string : mixed

The string that is to be written.

Return values
int —

Returns the number of bytes written to the stream.

On this page