Although the documentation is still a bit sketchy, it might be a good place to start. After that, feel free to ask a question at github or send an email to info at backend-php dot net.
PHP MVC Framework. Simple. Easy. Awesome.
This version of Backend will be deprecated soon. Check out the development of the latest version on GitHub
Download v.1.0.3 
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Backend-PHP is an easy to use Web Application Framework and Data Manipulator and Translator for the Web Developer.
