stream_copy_to_stream

<?php     public function dimensions()

    {

        stream_copy_to_stream($this->storage->readStream($this->path), $tmpFile = tmpfile());



        return @getimagesize(stream_get_meta_data($tmpFile)['uri']);

    }

<?php     private function copyStreamToStream($source, $target): void

    {

        if (@stream_copy_to_stream($source, $target) === false) {

            throw CannotCopyStreamToStream::new(error_get_last());

        }

    }

<?php         error_clear_last();

        $stream = @fopen($prefixedLocation, 'w+b');



        if ( ! ($stream && false !== stream_copy_to_stream($contents, $stream) && fclose($stream))) {

            $reason = error_get_last()['message'] ?? '';

            throw UnableToWriteFile::atLocation($prefixedLocation, $reason);

        }

<?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);