Zend\Diactoros\UploadedFile::moveTo PHP Method

    public function moveTo($targetPath)
    {
        if ($this->moved) {
            throw new RuntimeException('Cannot move file; already moved!');
        }
        if ($this->error !== UPLOAD_ERR_OK) {
            throw new RuntimeException('Cannot retrieve stream due to upload error');
        }
        if (!is_string($targetPath) || empty($targetPath)) {
            throw new InvalidArgumentException('Invalid path provided for move operation; must be a non-empty string');
        }
        $targetDirectory = dirname($targetPath);
        if (!is_dir($targetDirectory) || !is_writable($targetDirectory)) {
            throw new RuntimeException(sprintf('The target directory `%s` does not exists or is not writable', $targetDirectory));
        }
        $sapi = PHP_SAPI;
        switch (true) {
            case empty($sapi) || 0 === strpos($sapi, 'cli') || !$this->file:
                // Non-SAPI environment, or no filename present
                $this->writeFile($targetPath);
                break;
            default:
                // SAPI environment, with file present
                if (false === move_uploaded_file($this->file, $targetPath)) {
                    throw new RuntimeException('Error occurred while moving uploaded file');
                }
                break;
        }
        $this->moved = true;
    }