Assumptive you have a apache webserver and you need to deal with an old application that fills up your log file with many strict entries. You need to prevent your "error_reporting" level to get overwritten.
You can achieve this by adding the following line in your apache httpd.conf.
php_admin_value error_reporting 22517
It is important you are using "php_admin_value" (or "php_admin_flag" when needed) instead of "php_value" to set the value. If you use "php_admin_value", you prevent the value gets overwritten by the ".htaccess" or a "ini_set()" call from your application.
Want to know more? Here are some links fitting to this topic.
Currently, there is no howto. But by the time of running into and solving problems with regex, a view pages helped my a lot. So here they are.
regex php german by phpwcms-howto.de
regex howto german by danielfett.de
regex howto english by zytrax.com
regex in apache mod_rewrite by apache.org
regex online tool by gskinner.com
regex online test by regexplanet.com
All the needed configuration parameters you can/have to to are linked below. In this entry i want to point out the use of setenv.sh.
With setenv.sh you don't have to edit the default startup script from the tomcat. This means you also can backup/store your settings on a well know place and then just create a link into the directory where your catalina.sh file is placed.
The catalina.sh script itself looks for a setenv.sh and reads it. Everything that is configured inside the setenv.sh script overwrites the default settings inside the catalina.sh.
how to run a tomcat
how to configurate a tomcate