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(PHP 5, PHP 7, PHP 8)
stream_copy_to_stream — Copies data from one stream to another
$from,$to,$length = null,$offset = 0
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.
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
Returns the total count of bytes copied, 或者在失败时返回 false.
| 版本 | 说明 |
|---|---|
| 8.0.0 |
length is now nullable.
|
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";
?>
