Class PumpStream
- GuzzleHttp\Psr7\PumpStream implements Psr\Http\Message\StreamInterface
- Namespace: GuzzleHttp\Psr7
- Located at PumpStream.php
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.
Methods Summary
- __construct ( callable $source, array $options = [] )
-
__toString ( )
Reads all data from the stream into a string, from the beginning to end.
-
close ( )
Closes the stream and any underlying resources.
-
detach ( )
Separates any underlying resources from the stream.
-
getSize ( )
Get the size of the stream if known.
-
tell ( )
Returns the current position of the file read/write pointer
-
eof ( )
Returns true if the stream is at the end of the stream.
-
isSeekable ( )
Returns whether or not the stream is seekable.
-
rewind ( )
Seek to the beginning of the stream.
-
seek ( int $offset, int $whence = SEEK_SET )
Seek to a position in the stream.
-
isWritable ( )
Returns whether or not the stream is writable.
-
write ( string $string )
Write data to the stream.
-
isReadable ( )
Returns whether or not the stream is readable.
-
read ( int $length )
Read data from the stream.
-
getContents ( )
Returns the remaining contents in a string
-
getMetadata ( string $key = null )
Get stream metadata as an associative array or retrieve a specific key.
Methods Details
__construct ( callable $source, array $options = [] )
Parameters
| callable | $source | Source of the stream data. The callable MAY accept an integer argument used to control the amount of data to return. The callable MUST return a string when called, or false on error or EOF. |
| array | $options = [] | Stream options: - metadata: Hash of metadata to use with stream. - size: Size of the stream, if known. |
string __toString ( )
Reads all data from the stream into a string, from the beginning to end.
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.
Returns
| string |
See
Implementation of
close ( )
Closes the stream and any underlying resources.
Implementation of
resource|null detach ( )
Separates any underlying resources from the stream.
After the stream has been detached, the stream is in an unusable state.
Returns
| resource|null Underlying PHP stream, if any |
Implementation of
integer|null getSize ( )
Get the size of the stream if known.
Returns
| integer|null Returns the size in bytes if known, or null if unknown. |
Implementation of
integer tell ( )
Returns the current position of the file read/write pointer
Returns
| integer Position of the file pointer |
Exceptions
| RuntimeException on error. |
Implementation of
boolean eof ( )
Returns true if the stream is at the end of the stream.
Returns
| boolean |
Implementation of
boolean isSeekable ( )
Returns whether or not the stream is seekable.
Returns
| boolean |
Implementation of
rewind ( )
Seek to the beginning of the stream.
If the stream is not seekable, this method will raise an exception; otherwise, it will perform a seek(0).
Exceptions
| RuntimeException on failure. |
See
Link
Implementation of
seek ( integer $offset, integer $whence = SEEK_SET )
Seek to a position in the stream.
Parameters
| integer | $offset | Stream offset |
| integer | $whence = 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 |
Exceptions
| RuntimeException on failure. |
Link
Implementation of
boolean isWritable ( )
Returns whether or not the stream is writable.
Returns
| boolean |
Implementation of
integer write ( string $string )
Write data to the stream.
Parameters
| string | $string | The string that is to be written. |
Returns
| integer Returns the number of bytes written to the stream. |
Exceptions
| RuntimeException on failure. |
Implementation of
boolean isReadable ( )
Returns whether or not the stream is readable.
Returns
| boolean |
Implementation of
string read ( integer $length )
Read data from the stream.
Parameters
| integer | $length | 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. |
Returns
| string Returns the data read from the stream, or an empty string if no bytes are available. |
Exceptions
| RuntimeException if an error occurs. |
Implementation of
string getContents ( )
Returns the remaining contents in a string
Returns
| string |
Exceptions
| RuntimeException if unable to read or an error occurs while reading. |
Implementation of
array|mixed|null getMetadata ( string $key = null )
Get stream metadata as an associative array or retrieve a specific key.
The keys returned are identical to the keys returned from PHP's stream_get_meta_data() function.
Parameters
| string | $key = null | Specific metadata to retrieve. |
Returns
| array|mixed|null Returns an associative array if no key is provided. Returns a specific key value if a key is provided and the value is found, or null if the key is not found. |