pcre2-migration
Status: Implemented (in PHP 7.3)
SELinux will prevent PREG_* functions from working
Feb 8 12:40:51 servername setroubleshoot: SELinux is preventing httpd from using the execmem access on a process.
you need to add preg.jit=0 to php.ini or init_set('preg.jit', 0) if you can't do that
try the [PCRE] section so you can find it