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stream_encoding> <stream_context_set_params
[edit] Last updated: Fri, 22 Jul 2011

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(PHP 5)

stream_copy_to_streamCopies data from one stream to another


int stream_copy_to_stream ( resource $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.



The source stream


The destination stream


Maximum bytes to copy


The offset where to start to copy data

Return Values

Returns the total count of bytes copied.


Version Description
5.1.0 Added the offset parameter


Example #1 A stream_copy_to_stream() example

$dest1 fopen('first1k.txt''w');
$dest2 fopen('remainder.txt''w');

stream_copy_to_stream($src$dest11024) . " bytes copied to first1k.txt\n";
stream_copy_to_stream($src$dest2) . " bytes copied to remainder.txt\n";


See Also

stream_encoding> <stream_context_set_params
[edit] Last updated: Fri, 22 Jul 2011
add a note add a note User Contributed Notes stream_copy_to_stream
felix dot nensa at gmail dot com 26-May-2010 11:57
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:


function pipe_streams($in, $out)
$size = 0;
        while (!
feof($in)) $size += fwrite($out,fread($in,8192));

sundance2001 guess what 25-Jul-2007 01:54
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');
   return $bytes;
none at noone dot com 15-Jun-2007 11:27
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.


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.

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