[TYPO3-english] Use return value from user function in typoscript to set value in TSFE

[michael müller]

Is it possible to use the return value of a user function in typoscript to set value in TSFE?

Example:

Typoscript:
temp.10 = USER_INT
temp.10.includeLibs = test.php
temp.10.userFunc = myclass->myfunction

PHP:
<?php
    class myclass {
       function myfunction() {
           return 3;
       }
    }

To rendering:
page.10 < temp.10
But how it works for something like: config.sys_language_uid < temp.10; now the value is USER_INT and not 3.

THX