stream_copy_to_stream

<?php             $source = fopen($source, 'r');

            $target = fopen($target, 'w+');



            stream_copy_to_stream($source, $target);

            fclose($source);

            fclose($target);

        }

<?php                 throw new IOException(sprintf('Failed to copy "%s" to "%s" because target file could not be opened for writing.', $originFile, $targetFile), 0, null, $originFile);

            }



            $bytesCopied = stream_copy_to_stream($source, $target);

            fclose($source);

            fclose($target);

            unset($source, $target);