postrm is in php-horde-lz4 1.0.2-2build1.
This file is a maintainer script. It is executed when installing (*inst) or removing (*rm) the package.
The actual contents of the file can be viewed below.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 | #!/bin/sh
set -e
# Automatically added by dh_php5
if [ "$1" = "purge" ] ; then
    if [ -e /usr/share/php5/php5-maintscript-helper ] ; then
	. /usr/share/php5/php5-maintscript-helper
	for conf in horde_lz4  ; do
	    php5_invoke dismod ALL $conf || exit $?
	done
    fi
fi
# End automatically added section
 |