you may have your own android app store.these simple classes are free and help you to get all app data from google play
such as name,permissions,price,screenshots and etc.
so now easily google play is your data source.
for this class you need php 5.3 or upper and enable
php_openssl.dll extension in your php.ini file.
you may want to test it.to test this in your local web server folder extract data to your web server folder.
in xampp is htdocs folder!!!
if want to know how to get package...