This file is indexed.

postinst is in php5-ps 1.3.6-6.

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.

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#!/bin/sh -e

PECL_NAME=ps
PHP_VERSION=5

if [ "$DPKG_DEBUG" = "developer" ]; then
  set -x
fi

if [ "$1" != "configure" ]; then
  exit 0
fi

if [ "$2" ] && dpkg --compare-versions "$2" lt "1.3.4-3"; then
	extension_re="^[[:space:]]*extension[[:space:]]*=[[:space:]]*${PECL_NAME}\.so"
	for SAPI in apache2 apache cgi cli; do
		ini_file="/etc/php${PHP_VERSION}/$SAPI/php.ini"
		if [ -f "$ini_file" ]; then
			if grep -q "$extension_re" "$ini_file"; then
				sed -i -e "/$extension_re/d" "$ini_file"
			fi
		fi
	done
fi

##

exit 0