php man page for eio_write

EIO_WRITE(3)								 1							      EIO_WRITE(3)

eio_write - Write to file

SYNOPSIS
       resource  eio_write (mixed  $fd, string	$str, [int  $length], [int  $offset], [int  $pri = EIO_PRI_DEFAULT], [callable	$callback = NULL],
       [mixed  $data = NULL])

DESCRIPTION
       eio_write(3) writes up to $length bytes from $str at $offset offset from the beginning of the file.

PARAMETERS
	      o $fd
		- Stream, Socket resource, or numeric file descriptor, e.g. returned by eio_open(3)

	      o $str
		- Source string

	      o $length
		- Maximum number of bytes to write.

	      o $offset
		- Offset from the beginning of file.

	      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_write(3) returns request resource on success or FALSE on error.

SEE ALSO eio_open.
PHP Documentation Group 													      EIO_WRITE(3)