I was able to successfully install and set up Expression Engine on a client site, but in trying to remove the index.php from the URL, I uploaded an .htaccess file with rewrite directives that I found here:
http://kevinthompson.info/blog/completely-remove-index-php-from-expressionengine-urls/
Then I changed the configuration to leave the index page blank. When the .htaccess method didn’t work, I removed the .htaccess file, and tried to log back into the admin page to undo my previous change to the index page. Unfortunately, the admin page doesn’t load anymore. I went into the system config file to set $config[‘index_page’] = “index.php”.
However, this still didn’t fix the problem. I can’t seem to log back into the admin page anymore, and I don’t know what’s going on.