Bug #79019: Copied cURL handles upload empty file

Hi all, as of PHP 7.4.0 with libcurl >= 7.56.0, CurlFile accepts any supported stream URLs (formerly it only accepted file names). There is, however, a bug in the current implementation which breaks the upload for copied cURL handles (curl_copy_handle()). A pull request to fix this[1] is available. Now the question came up, whether we should open these streams lazily (i.e. only when libcurl needs it; basically the same behavior like PHP 7.3), or whether the streams should be opened in advance. The latter would have the advantage that we easily could resolve bug #79013[2] (which may not be a bug at all), but the drawback that there may be more open streams than strictly necessary. I tend to prefer the current solution (i.e. open the streams lazily), but would like to hear more opinions on that. [1] <https://github.com/php/php-src/pull/5045/commits/726db27d1cb9023ec6f474d9bc5a7250a6e2386b> [2] <https://bugs.php.net/79013> Thanks, Christoph