stream_copy_to_stream
(PHP 5)
stream_copy_to_stream — Copies data from one stream to another
Описание
int stream_copy_to_stream
( resource $source
, resource $dest
[, int $maxlength
[, int $offset
]] )
Makes a copy of up to maxlength bytes of data from the current position (or from the offset position, if specified) in source to dest . If maxlength is not specified, all remaining content in source will be copied.
Список параметров
- source
-
The source stream
- dest
-
The destination stream
- maxlength
-
Maximum bytes to copy
- offset
-
The offset where to start to copy data
Возвращаемые значения
Returns the total count of bytes copied.
Список изменений
| Версия | Описание |
|---|---|
| 5.1.0 | Added the offset parameter |
Примеры
Пример #1 A stream_copy_to_stream() example
<?php
$src = fopen('http://www.example.com', 'r');
$dest1 = fopen('first1k.txt', 'w');
$dest2 = fopen('remainder.txt', 'w');
echo stream_copy_to_stream($src, $dest1, 1024) . " bytes copied to first1k.txt\n";
echo stream_copy_to_stream($src, $dest2) . " bytes copied to remainder.txt\n";
?>
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Коментарии
stream_copy_to_stream almost copies a stream...
$objInputStream = fopen("php://input", "rb");
$objTempStream = fopen("php://temp", "w+b");
stream_copy_to_stream($objInputStream, $objTempStream);
That code will copy a stream but it will also move the stream pointers to EOF. This is fine if you plan on rewinding the temp stream but good luck rewinding the input stream.
rewind($objTempStream);
rewind($objInputStream);
So as you can see this is stream copy or stream move depending on what kind of stream you are working with, and because there are no peaking functions your effed if you need to read from an input stream in multiple classes that are unrelated.
note that this function does not actually use sendfile() on linux systems (at least not in PHP 7.2.12)