libapache2-mod-php5filter-dbgsym 5.6.17+dfsg-3ubuntu1 (amd64 binary) in ubuntu xenial

 This package provides the PHP5 Filter module for the Apache 2 webserver.
 Please note that this package ONLY works with Apache's prefork MPM, as it
 is not compiled thread-safe.
 .
 Unless you specifically need filter-module support, you most likely
 should instead install libapache2-mod-php5.
 .
 .
 .
 PHP (recursive acronym for PHP: Hypertext Preprocessor) is a widely-used
 open source general-purpose scripting language that is especially suited
 for web development and can be embedded into HTML.