问题
I would like to test the existence of a file in my httpd.conf of Apache 2.4.
I use the tag like this :
<If "%{DocumentRoot}/maintenance.enable -f">
...code to execute ...
</If>
but my code is not good, apache's service doesn't want to start. I have read a lot of tutorials or docs on many sites but never found the answer :(
Please help me ...
回答1:
You should read Apache error log as it might provide some hint on how it is interpreted.
Anyway, the right syntax is: <If "-f %{DOCUMENT_ROOT} . '/maintenance.enable'">
来源：https://stackoverflow.com/questions/26138120/how-to-test-if-file-exists-with-the-tag-if-on-apache-2-4