Chances are most Apache/PHP installations run mpm_prefork and aren’t affected by this.
why? mod_mpm_event is what can be assumed to be the default since apache 2.4 (± 2012):
https://httpd.apache.org/docs/current/mpm.html#defaults
alt Hacker News
why? mod_mpm_event is what can be assumed to be the default since apache 2.4 (± 2012):
https://httpd.apache.org/docs/current/mpm.html#defaults