php-fdomdocument 1.6.1-1build1 (armhf binary) in ubuntu xenial

 An Extension to PHP's standard DOM to add various convenience methods and
 exceptions by default.
 .
 The fDOMDocument classes extend the standard DOM to use exceptions at
 all occasions of errors instead of PHP warnings or notices. They also
 add various custom methods and shortcuts for convenience and to
 simplify the usage of DOM.