Using Apache HTTPD as the webserver on Fedora:
* In the PHP config (on Fedora:`/etc/php.ini`), set
```
error_reporting = E_ALL & ~E_NOTICE & ~E_STRICT & ~E_DEPRECATED
display_errors = on
log_errors = on
```
* In Phorge, enable `phabricator.developer-mode` (via the web interface at `/config/edit/phabricator.developer-mode/`, or on the shell via `/phorge/bin/config set phabricator.developer-mode true`)
* If you use `mod_php`, by default stacktraces are in the Apache HTTPD error log (on Fedora: `/var/log/httpd/error_log`), or in the file defined as `ErrorLog` for the `<VirtualHost>` in your Apache HTTPD config (on Fedora: `/etc/httpd/conf/httpd.conf`)
* If you use `php-fpm` instead of `mod_php`, stacktraces are in the php-fpm error log (on Fedora: `/var/log/php-fpm/www-error.log`)