note that this function does not actually use sendfile() on linux systems (at least not in PHP 7.2.12)
stream_copy_to_stream
(PHP 5, PHP 7)
stream_copy_to_stream — Copies data from one stream to another
설명
int stream_copy_to_stream
( resource
$source
, resource $dest
[, int $maxlength = -1
[, int $offset = 0
]] )
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.
인수
-
source -
The source stream
-
dest -
The destination stream
-
maxlength -
Maximum bytes to copy
-
offset -
The offset where to start to copy data
반환값
Returns the total count of bytes copied, 실패 시 FALSE를 반환합니다.
변경점
| 버전 | 설명 |
|---|---|
| 5.1.0 |
Added the offset parameter
|
예제
Example #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";
?>
add a note
User Contributed Notes 3 notes
divinity76 at gmail dot com ¶
5 years ago
none at noone dot com ¶
16 years ago
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($objInputStream);
So as you can see this is stream copy or stream move depending on what kind of stream you are working with, and because there are no peaking functions your effed if you need to read from an input stream in multiple classes that are unrelated.
felix dot nensa at gmail dot com ¶
13 years ago
As stream_copy_to_stream() seems to be quite a memory hog (at least in PHP 5.1.6 64-bit) it may be way more efficient just to copy streams with this simple PHP alternative:
<?php
function pipe_streams($in, $out)
{
$size = 0;
while (!feof($in)) $size += fwrite($out,fread($in,8192));
return $size;
}
?>
