[php-src] Issue #9228: readgzfile only writes to standard output

Issue: https://github.com/php/php-src/issues/9228 Author: 8ctopus ### Description Currently readgzfile() writes the file content to the standard output. ```php readgzfile(string $filename, int $use_include_path = 0): int|false ``` It would be great if there was an easier way to write the file content to a variable, as for now I'm using this not elegant workaround: ```php ob_start(); readgzfile('/tmp/test.gz'); $content = ob_get_clean(); ``` Here's my proposition: ```php readgzfile(string $filename, int $use_include_path = 0, ?string &$content = null): int|false ``` Which would write to standard output if $content is null and to $content otherwise.