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(PHP 5)
stream_copy_to_stream — Copies data from one stream to another
$source
, resource $dest
[, int $maxlength
= -1
[, int $offset
= 0
]] )
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.
source
The source stream
dest
The destination stream
maxlength
Maximum bytes to copy
offset
The offset where to start to copy data
Returns the total count of bytes copied.
版本 | 说明 |
---|---|
5.1.0 |
Added the offset parameter
|
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 , $dest2 ) . " bytes copied to remainder.txt\n" ;
?>
[#1] felix dot nensa at gmail dot com [2010-05-26 16:57:28]
As stream_copy_to_stream() seems to be quite a memory hog (at least in PHP 5.1.6 64-bit) it may be way more efficient just to copy streams with this simple PHP alternative:
<?php
function pipe_streams($in, $out)
{
$size = 0;
while (!feof($in)) $size += fwrite($out,fread($in,8192));
return $size;
}
?>
[#2] sundance2001 guess what gmail.com [2007-07-25 06:54:53]
If you need to copy a file from any website into yours you can use following function:
function getUrlContents($url)
{
$url_parsed = parse_url($url);
$host = $url_parsed["host"];
if ($url == '' || $host == '') {
return false;
}
$port = 80;
$path = (empty($url_parsed["path"]) ? '/' : $url_parsed["path"]);
$path.= (!empty($url_parsed["query"]) ? '?'.$url_parsed["query"] : '');
$out = "GET $path HTTP/1.0\r\nHost: $host\r\nConnection: Close\r\n\r\n";
$fp = fsockopen($host, $port, $errno, $errstr, 30);
fwrite($fp, $out);
$headers = '';
$content = '';
$buf = '';
$isBody = false;
while (!feof($fp) and !$isBody) {
$buf = fgets($fp, 1024);
if ($buf == "\r\n" ) {$isBody = true;}
else{$headers .= $buf;}
}
$file1 = fopen(basename($url_parsed["path"]), 'w');
$bytes=stream_copy_to_stream($fp,$file1);
fclose($fp);
return $bytes;
}
[#3] none at noone dot com [2007-06-15 16:27:41]
stream_copy_to_stream almost copies a stream...
$objInputStream = fopen("php://input", "rb");
$objTempStream = fopen("php://temp", "w+b");
stream_copy_to_stream($objInputStream, $objTempStream);
That code will copy a stream but it will also move the stream pointers to EOF. This is fine if you plan on rewinding the temp stream but good luck rewinding the input stream.
rewind($objTempStream);
rewind($objInputStream);
So as you can see this is stream copy or stream move depending on what kind of stream you are working with, and because there are no peaking functions your effed if you need to read from an input stream in multiple classes that are unrelated.