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 $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.

参数

source

The source stream

dest

The destination stream

maxlength

Maximum bytes to copy

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.

范例

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";

?>

参见