Linux noob here. I found the php files, but I don't know how to open or view them.
If you have a SFTP client just point it to your ip with minera/minera as user/pass you should be able to navigate the filesystem and get the files (then just open them with a text-edit)
Files are in /var/log/minera or /var/www/minera/application/logs (it's a directory link)
Here is what the logs look like
ERROR - 2014-05-28 23:55:02 --> Miner is up
ERROR - 2014-05-28 23:55:02 --> Storing stats...
ERROR - 2014-05-28 23:55:03 --> Delta Stats stored as: {"timestamp":1401321303,"pool_hashrate":2974929,"hashrate":3757777,"avg_freq":0,"accepted":0,"errors":0,"rejected":0,"shares":0}
ERROR - 2014-05-28 23:55:03 --> Total Stats stored as: {"timestamp":1401321303,"pool_hashrate":2974929,"hashrate":3757777,"avg_freq":895,"accepted":7629,"errors":40,"rejected":35,"shares":3639005}
ERROR - 2014-05-28 23:55:04 --> Sending data to Mobileminer
ERROR - 2014-05-28 23:56:02 --> Miner is up
ERROR - 2014-05-28 23:56:02 --> Storing stats...
ERROR - 2014-05-28 23:56:03 --> Delta Stats stored as: {"timestamp":1401321363,"pool_hashrate":4971027,"hashrate":3757840,"avg_freq":0,"accepted":8,"errors":0,"rejected":0,"shares":4096}
ERROR - 2014-05-28 23:56:03 --> Total Stats stored as: {"timestamp":1401321363,"pool_hashrate":4971027,"hashrate":3757840,"avg_freq":895,"accepted":7637,"errors":40,"rejected":35,"shares":3643101}
ERROR - 2014-05-28 23:56:04 --> Sending data to Mobileminer
ERROR - 2014-05-28 23:57:02 --> Miner is up
ERROR - 2014-05-28 23:57:02 --> Storing stats...
ERROR - 2014-05-28 23:57:03 --> Delta Stats stored as: {"timestamp":1401321423,"pool_hashrate":2354697,"hashrate":3758129,"avg_freq":0,"accepted":0,"errors":0,"rejected":0,"shares":0}
ERROR - 2014-05-28 23:57:03 --> Total Stats stored as: {"timestamp":1401321423,"pool_hashrate":2354697,"hashrate":3758129,"avg_freq":895,"accepted":7637,"errors":40,"rejected":35,"shares":3643101}
ERROR - 2014-05-28 23:57:04 --> Sending data to Mobileminer
ERROR - 2014-05-28 23:58:02 --> Miner is up
ERROR - 2014-05-28 23:58:02 --> Storing stats...
ERROR - 2014-05-28 23:58:03 --> Delta Stats stored as: {"timestamp":1401321483,"pool_hashrate":4431717,"hashrate":3758139,"avg_freq":0,"accepted":7,"errors":0,"rejected":0,"shares":3584}
ERROR - 2014-05-28 23:58:03 --> Total Stats stored as: {"timestamp":1401321483,"pool_hashrate":4431717,"hashrate":3758139,"avg_freq":895,"accepted":7644,"errors":40,"rejected":35,"shares":3646685}
ERROR - 2014-05-28 23:58:04 --> Sending data to Mobileminer
ERROR - 2014-05-28 23:59:02 --> Miner is up
ERROR - 2014-05-28 23:59:02 --> Storing stats...
ERROR - 2014-05-28 23:59:03 --> Delta Stats stored as: {"timestamp":1401321543,"pool_hashrate":2672477,"hashrate":3758158,"avg_freq":0,"accepted":2,"errors":0,"rejected":0,"shares":1024}
ERROR - 2014-05-28 23:59:03 --> Total Stats stored as: {"timestamp":1401321543,"pool_hashrate":2672477,"hashrate":3758158,"avg_freq":895,"accepted":7646,"errors":40,"rejected":35,"shares":3647709}