stream_copy_to_stream
(PHP 5, PHP 7, PHP 8)
stream_copy_to_stream — Copies data from one stream to another
说明
stream_copy_to_stream(
resource
resource
?int
int
): int|false
resource
$from,resource
$to,?int
$length = null,int
$offset = 0): int|false
Makes a copy of up to length bytes
of data from the current position (or from the
offset position, if specified) in
from to to. If
length is null, all remaining content in
from will be copied.
参数
from-
The source stream
to-
The destination stream
length-
Maximum bytes to copy. By default all bytes left are copied.
offset-
The offset where to start to copy data
返回值
Returns the total count of bytes copied, 或者在失败时返回 false.
更新日志
| 版本 | 说明 |
|---|---|
| 8.0.0 |
length is now nullable.
|
示例
示例 #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";
?>