Extending SplTempFileObject with a store method

php-tmp-file.php

class TmpFile extends SplTempFileObject
{
    public function store(string $filename): void
    {
        file_put_contents($filename, $this->getContents());
    }

    public function getContents(): ?string
    {
        $this->rewind();

        ob_start();
        $this->fpassthru();
        $contents = ob_get_contents();
        ob_end_clean();

        return $contents;
    }
}

// Usage
$filepath = __DIR__ . '/file.txt';

$file = new TmpFile();
$file->fwrite('Lorem dolor sit amet');
$file->fwrite('...');
$file->store($filepath);