I have this issue on my server. It happens sometimes when I refresh my webpages. It seems litespeed wont pass file.php
to php compiler and instead of rendering HTML and interpreting PHP, I will see my PHP source code. It won't happen always, only 2 or 3 times in 50 tries.
My PHP version is 5.3.10
but I had the same problem with 5.2.17
too. My Litespeed version is V5.5
on CentOS 6 (x64)