PHP Manual
Stream 函数
Copies data from one stream to another

stream_copy_to_stream

(PHP 5, PHP 7)

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

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.

更新日志

版本	说明
5.1.0	Added the `offset` parameter

范例

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";

?>

参见

copy() - 拷贝文件

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