AppendStream
in package
implements
StreamInterface
Reads from multiple streams, one after the other.
This is a read-only stream decorator.
Interfaces, Classes, Traits and Enums
- StreamInterface
- Describes a data stream.
Table of Contents
- $current : int
- $pos : int
- $seekable : bool
- $streams : array<string|int, StreamInterface>
- __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.
Properties
$current
private
int
$current
= 0
$pos
private
int
$pos
= 0
$seekable
private
bool
$seekable
= true
$streams
private
array<string|int, StreamInterface>
$streams
= []
Streams being decorated
Methods
__construct()
public
__construct([array<string|int, StreamInterface> $streams = [] ]) : mixed
Parameters
- $streams : array<string|int, StreamInterface> = []
-
Streams to decorate. Each stream must be readable.
Return values
mixed —__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
Return values
void —close()
Closes each attached stream.
public
close() : void
Return values
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.
Return values
mixed —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).
Return values
void —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.
Return values
void —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.