postrm is in php7.2-phpdbg 7.2.3-1ubuntu1.
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 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 | #!/bin/sh
set -e
php_enable() { return 0; }
if [ "$1" = "remove" ]; then
    if [ -e /usr/lib/php/php-maintscript-helper ]; then
	. /usr/lib/php/php-maintscript-helper
	mods=$(phpquery -M -v 7.2)
	for mod in $mods; do
	    php_invoke dismod 7.2 phpdbg $mod
	done
    else
	for mod in /etc/php/7.2/conf.d/*.ini; do 
	    rm -f $mod
	    for ext in '~' '%' .bak .ucf-new .ucf-old .ucf-dist;  do
		rm -f $mod$ext
	    done
	done
    fi
fi
if [ "$1" = "purge" ]; then
    phpini=/etc/php/7.2/phpdbg/php.ini
    # remove the flag to remember the original state
    if [ -e /etc/php/7.2/phpdbg/.start ]; then
	rm -f /etc/php/7.2/phpdbg/.start
    fi
    for ext in '~' '%' .bak .ucf-new .ucf-old .ucf-dist;  do
	rm -f $phpini$ext
    done
    rm -f $phpini
    if which ucf >/dev/null; then
	ucf --purge $phpini
    fi
    if which ucfr >/dev/null; then
	ucfr --purge php7.2-phpdbg $phpini
    fi
    for dir in \
	/etc/php/7.2/phpdbg/conf.d \
	/etc/php/7.2/phpdbg \
	/etc/php/7.2/ \
	/etc/php; do
	
	if [ -d $dir ]; then
	    rmdir --ignore-fail-on-non-empty $dir
	fi
    done
fi
exit 0
 |