Documentation

PumpStream
in package
implements StreamInterface

Provides a read only stream that pumps data from a PHP callable.

When invoking the provided callable, the PumpStream will pass the amount of data requested to read to the callable. The callable can choose to ignore this value and return fewer or more bytes than requested. Any extra data returned by the provided callable is buffered internally until drained using the read() function of the PumpStream. The provided callable MUST return false when there is no more data to read.

Interfaces, Classes, Traits and Enums

StreamInterface
Describes a data stream.

Table of Contents

$buffer  : BufferStream
$metadata  : array<string|int, mixed>
$size  : int|null
$source  : callable|null
$tellPos  : int
__construct()  : mixed
__toString()  : string
Reads all data from the stream into a string, from the beginning to end.
close()  : void
Closes the stream and any underlying resources.
detach()  : resource|null
Separates any underlying resources from the 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
Get the size of the stream if known.
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
Read data from the stream.
rewind()  : void
Seek to the beginning of the stream.
seek()  : void
Seek to a position in the stream.
tell()  : int
Returns the current position of the file read/write pointer
write()  : int
Write data to the stream.
pump()  : void

Properties

$metadata

private array<string|int, mixed> $metadata

Methods

__construct()

public __construct(callable $source[, array<string|int, mixed> $options = [] ]) : mixed
Parameters
$source : callable
$options : array<string|int, mixed> = []
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 —

close()

Closes the stream and any underlying resources.

public close() : void
Return values
void —

detach()

Separates any underlying resources from the stream.

public detach() : resource|null

After the stream has been detached, the stream is in an unusable state.

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()

Get the size of the stream if known.

public getSize() : int|null
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()

Read data from the stream.

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()

Seek to a position in the stream.

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.

pump()

private pump(int $length) : void
Parameters
$length : int
Return values
void —

Search results