Package: php7.0-xml Version: 7.0.8-5 Severity: normal Hey.
This happens on a jessie system (!!) where I've enabled all PHP 7 packages via apt_preferences mechanism in order to run Icinga Web2 from testing The whole thing is via Apache HTTP and using the CGI SAPI. On every access to the site, I get a: PHP Warning: PHP Startup: Unable to load dynamic library '/usr/lib/php/20151012/wddx.so' - /usr/lib/php/20151012/wddx.so: undefined symbol: php_XML_SetUserData in Unknown on line 0 PHP Warning: PHP Startup: Unable to load dynamic library '/usr/lib/php/20151012/wddx.so' - /usr/lib/php/20151012/wddx.so: undefined symbol: php_XML_SetUserData in Unknown on line 0 in the Apache error logs. It doesn't really seem to cause any problems, but possibly, Icigna Web2 simply makes no use of wddx and just requires other stuff from modules shipped with php-xml. Best wishes, Chris.

