As userFunc lover, questionable choice, we should keep us updated about changes done on new TYPO3 version released...and you too...
includeLibs
The first difference noticed is the inclusion of a userFunc library in TypoScript.
In version 6 you could include the physical file containing a script by inserting, arbitrarily the page, one of these strings and after userFunc include:
config.includeLibrary = {$myPhpLib} or includeLibs.myLib = {$myPhpLib}
...
page.20= USER
page.20.userFunc= user_myLib->myFunc
Where $myPhpLib is /path/user_myLib.php
In TYPO3 7 USER e USER_INT, the only way, apparently after few test with old methods, is to insert the lib directly in the object:
page.20= USER
page.20.includeLibs = {$myPhpLib}
page.20.userFunc= user_myLib->myFunc
debug
After the correct inclusion, as first test has been inserted the debug function, t3lib_utility_Debug::debug, unfortunately without success and the following error has been returned:
PHP Fatal error: Class 't3lib_utility_Debug' not found
In old version, in the code, was sufficient call the object in the function:
public function debug($what){
t3lib_utility_Debug::debug($what);
return true;
}
In the new version, it is required specify entire namespace in the inclusion:
public function debug($what){
TYPO3\CMS\Core\Utility\DebugUtility::debug($what);
return true;
}
One thing it seems deeply changed, the screen output:
from 
to
New updates about changes will be available soon.
DON'T PANIC