php man page for eio_sendfile

EIO_SENDFILE(3) 							 1							   EIO_SENDFILE(3)

eio_sendfile - Transfer data between file descriptors

SYNOPSIS
       resource eio_sendfile (mixed  $out_fd, mixed  $in_fd, int  $offset, int	$length, [int  $pri], [callable  $callback], [string  $data])

DESCRIPTION
       eio_sendfile(3) copies data between one file descriptor and another. See SENDFILE(2) man page for details.

PARAMETERS
	      o $out_fd
		- Output stream, Socket resource, or file descriptor. Should be opened for writing.

	      o $in_fd
		- Input stream, Socket resource, or file descriptor. Should be opened for reading.

	      o $offset
		- Offset within the source file.

	      o $length
		- Number of bytes to copy.

	      o $pri
		-The  request  priority:  EIO_PRI_DEFAULT,  EIO_PRI_MIN,  EIO_PRI_MAX,	or  NULL.  If  NULL  passed,  $pri  internally	is  set to
		EIO_PRI_DEFAULT.

	      o $callback
		-$callback function is called when the request is done. It should match the following prototype:

	      void callback(mixed $data, int $result[, resource $req]);

		     o $data
		       -is custom data passed to the request.

		     o $result
		       -request-specific result value; basically, the value returned by corresponding system call.

		     o $req
		       -is optional request resource which can be used with functions like eio_get_last_error(3)

	      o $data
		- Arbitrary variable passed to $callback.

RETURN VALUES
       eio_sendfile(3) returns request resource on success or FALSE on error.

PHP Documentation Group 													   EIO_SENDFILE(3)