[php-src] Issue #8219: Stream Wrapper + Stream Filter cannot longer alter PHP file since PHP 7.4

Issue: https://github.com/php/php-src/issues/8219 Comment Author: cmb69 Okay, I had a closer look, and found that the behavioral change has been introduced by c2c5c9a973559b7ba9f84337c5f8078e59e98a91. So the problem with the existing code is actually the StreamWrapper::stream_stat() implementation. At least the size needs to properly match the filtered output. Quick fix for the given script: ````.php public function stream_stat(): array { $stat = fstat($this->resource); $stat["size"] = $stat["size"] + 4; return $stat; } ```` Of course, that won't work in practice; instead the code needs to track the actual size.