Once your script runs, it’s too late to not cache the file. You need to set it outside PHP:
-
If PHP runs as Apache module, use an
.htaccessfile:php_flag opcache.enable Off -
If PHP runs as CGI/FastCGI, use a
.user.inifile:opcache.enable=0
In all cases, you can also use good old system-wide php.ini if you have access to it.