roundcube on debian: PHP Fatal error: Call to undefined function dl()

[Jan Kowalsky]

Hi all,

does anybody has a solution or a workaround for bug 
https://issues.kolab.org/show_bug.cgi?id=2429 ?

Some parts of Roundcube (addressbook, compose) in Debian Wheezy doesn't work 
with error 

PHP Fatal error:  Call to undefined function dl() in 
/usr/share/php/kolabobject.php on line 22

in .../apache2/error.log

Like in the comment simply editing /etc/php5/apache2/php.ini doesn't help for 
me. Are there other places for php configs where I have to adjust something?

http://www.php.net/manual/en/migration53.sapi.php
"The dl() function is now disabled by default, and is now available only under 
the CLI, CGI, and embed SAPIs. "

Does it mean anything in relation to the error?

The files-component doesn't work at all with an error "Internal server error" 
in the roundcube-interface but in no one of the log files. Could it be the same 
problem?

Thanks for any hint.

Jan