500 Error on index.php file. All other php files are working well.
I'm newbie in Ubuntu. I've successfully installed LAMP and created some virtual hosts. Everything is working fine except index.php files. When I try access them, browser returns 500 Error, regardless of their content. All other PHP files are working fine, index.html files can be opened without any errors. Please, help me to resolve this problem. I guess something wrong with server configuration, but I didn't find what exactly. :(