Strange questions about PHP5.4 on Linux

Strange problems with Linux under PHP5.4
Today, occasionally interested in debugging a previous write in the database packaging class, the results appear fatal error:class ' option ' not found strange error, very depressed, the front is printed a large OptIn class source code, and then Xdebug error report, This is the problem, thought is the class declaration of the problem, and then loaded with require_once all files, or not ...
My database class execution order is: MySQL extends db; DB extends option; The calling method is $db = db::getinstance (' mysql '); $db, Config ($config); $db->find ();
Why in Win under can, under Linux not, tested, not the problem of file permissions, is not the problem of file naming, using the direct loading, also used __autoload; why would I print the entire code of the option file on the page?
There's really no way.
Ask for answers ...!

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PHP not resolved?
Will it be

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