How should the app.php looks like for APC and Symfony 2.1

How should the app.php looks like for APC and Symfony 2.1

References

Reference NO 1

http://stackoverflow.com/questions/15186096/how-should-the-app-php-looks-like-for-apc-and-symfony-2-1

Reference NO 2

http://stackoverflow.com/questions/17983450/determining-development-environment-automatically

Reference NO 3

http://stackoverflow.com/questions/10758252/problems-trying-to-running-symfony-2-0-14-whoops-looks-like-something-went-wr

Reference NO 4

http://stackoverflow.com/questions/12974132/whats-the-purpose-of-the-symfony2-bootstrap-php-cache-file

Reference NO 5

http://stackoverflow.com/questions/10371073/symfony-class-loader-usage-no-examples-of-actual-usage

Reference NO 6

http://symfony.com/doc/current/book/performance.html

Reference NO 7

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Reference NO 8

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