(PHP 5, PHP 7, PHP 8)
stream_copy_to_stream — Copies data from one stream to another
$source
, resource $dest
, int $maxlength = -1
, int $offset = 0
) : int|false
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.
sourceThe source stream
destThe destination stream
maxlengthMaximum bytes to copy
offsetThe offset where to start to copy data
Returns the total count of bytes copied, 或者在失败时返回 false.
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";
?>