[php-src] Issue #8210: ob_start('ob_gzhandler') in 8.1.4 fails

Issue: https://github.com/php/php-src/issues/8210 Comment Author: jochensengier This is a website running Laravel v9.5.1 on PHP 8.1.4 https://www.vandelanotte.be/en If you navigate to: https://www.vandelanotte.be/en?debug=1 It will execute ob_start('ob_gzhandler'); at the top of the page/script and you'll see a content encoding error in every browser. The ob_start function is something I've been using for over a decade on various Laravel and PHP versions. GET /en HTTP/1.1 Host: www.vandelanotte.be Returns headers, response, ... GET /en?debug=1 HTTP/1.1 Host: www.vandelanotte.be Returns nothing, except an error. After some debugging, I found in one of the server logs that there's a deprecation error/warning, perhaps that is causing the issue? I noticed some PRs in this new version regarding ob_clean, maybe it's worth checking those out? [Thu Mar 17 14:37:35.363334 2022] [error] [pid 3226378] mod_proxy_fcgi.c(887): [client :0] AH01071: Got error 'PHP message: PHP Deprecated: Return type of ....' I know it's difficult to debug these kind of issues, so I really appreciate the effort and time you're putting into this.