diff --git a/conf/install_upgrade_roundcube.conf.sample b/conf/install_upgrade_roundcube.conf.sample
index efbf72f..a250f76 100644
--- a/conf/install_upgrade_roundcube.conf.sample
+++ b/conf/install_upgrade_roundcube.conf.sample
@@ -47,7 +47,7 @@ IPV6=""
 # - Note: it's not the 'DocumentRoot' directory, but the directory where
 # -       the 'DocumentRoot' Directory lives.
 # -
-# - Defaults to '/var/www/webmail/$WEBSITE_NAME'
+# - Defaults to '/var/www/$WEBSITE_NAME'
 # -
 #WEBSITE_BASEDIR=""
 
@@ -100,6 +100,15 @@ IPV6=""
 # -
 #CERT_ChainFile=""
 
+
+# - Is PHP installed from debian package system ?
+# -
+# - Boolean, possible values are 'true', 'false'
+# -
+# - Defaults to 'false'
+# 
+#PHP_DEBIAN_INSTALLATION=""
+
 # - Type of PHP installation.
 # -
 # - Possible values are: 'php_fpm' , 'fcgid' , 'mod_php
diff --git a/install_roundcube.sh b/install_roundcube.sh
index 1d92063..02a7243 100755
--- a/install_roundcube.sh
+++ b/install_roundcube.sh
@@ -157,6 +157,7 @@ MAIN_DOMAIN=${_tmp_string##*.}
 [[ -n "$IPV6" ]] || fatal  "IPv4 Address (IPV6) not present!" 
 
 [[ -n "$APACHE_DEBIAN_INSTALLATION" ]] || APACHE_DEBIAN_INSTALLATION=false
+[[ -n "$PHP_DEBIAN_INSTALLATION" ]] || PHP_DEBIAN_INSTALLATION=false
 
 httpd_binary="`which httpd`"
 if [ -z "$httpd_binary" ]; then
@@ -305,20 +306,24 @@ fi
 # -
 echononl "\tGet major version of latest installed PHP version"
 php_latest_ver=""
-if [[  -n "$php_major_versions" ]]; then
-   for _ver in $php_major_versions ; do
-      if [[ -z "$php_latest_ver" ]] ; then
-         php_latest_ver=$_ver
-      elif [[ "${_ver%.*}" -gt "${php_latest_ver%.*}" ]] ; then
-         php_latest_ver=$_ver
-      elif [[ "${_ver%.*}" -eq "${php_latest_ver%.*}" ]] ; then
-         [[ "${_ver#*.}"  -gt  "${php_latest_ver#*.}" ]] && php_latest_ver=$_ver
-      fi
-   done
-   echo_ok
-else
+if $PHP_DEBIAN_INSTALLATION ; then
    echo_skipped
-   warn "Getting major version of latest installed PHP version failed! -  No installed PHP versiond found!"
+else
+   if [[  -n "$php_major_versions" ]]; then
+      for _ver in $php_major_versions ; do
+         if [[ -z "$php_latest_ver" ]] ; then
+            php_latest_ver=$_ver
+         elif [[ "${_ver%.*}" -gt "${php_latest_ver%.*}" ]] ; then
+            php_latest_ver=$_ver
+         elif [[ "${_ver%.*}" -eq "${php_latest_ver%.*}" ]] ; then
+            [[ "${_ver#*.}"  -gt  "${php_latest_ver#*.}" ]] && php_latest_ver=$_ver
+         fi
+      done
+      echo_ok
+   else
+      echo_skipped
+      warn "Getting major version of latest installed PHP version failed! -  No installed PHP versiond found!"
+   fi
 fi
 
 echo ""
@@ -445,14 +450,13 @@ fi
 ## -
 ## - !! Take care to do this for all php installations (PHP 5.5/5.6/..)
 ## -
-for _version in $php_major_versions ; do
-
-   echo -e "\n\n\t\033[37m\033[1mInstall modules for PHP Version ${_version}..\033[m\n"
+echo -e "\n\n\t\033[37m\033[1mInstall modules for PHP Version ${_version}..\033[m\n"
+if $PHP_DEBIAN_INSTALLATION ; then
 
    for _module in $needed_php_pear_modules ; do
       echononl "\tInstall Module '$_module'.."
-      if ! /usr/local/php-${_version}/bin/pear list | grep -q "$_module" 2> /dev/null ; then
-         /usr/local/php-${_version}/bin/pear install $_module > $log_file 2>&1
+      if ! pear list | grep -q "$_module" 2> /dev/null ; then
+         pear install $_module > $log_file 2>&1
          if [[ "$?" = "0" ]]; then
             echo_ok
          else
@@ -460,7 +464,7 @@ for _version in $php_major_versions ; do
             error "$(cat $log_file)"
             if [[ "$_module" = "Net_IDNA2" ]]; then
                echononl "\tInstall (beta) Net_IDNA2-0.1.1 .."
-               /usr/local/php-${_version}/bin/pear install channel://pear.php.net/Net_IDNA2-0.1.1 > $log_file 2>&1
+               pear install channel://pear.php.net/Net_IDNA2-0.1.1 > $log_file 2>&1
                if [ "$?" = "0" ]; then
                   echo_ok
                else
@@ -473,7 +477,36 @@ for _version in $php_major_versions ; do
          echo_skipped
       fi
    done
-done
+   
+else
+   for _version in $php_major_versions ; do
+
+      for _module in $needed_php_pear_modules ; do
+         echononl "\tInstall Module '$_module'.."
+         if ! /usr/local/php-${_version}/bin/pear list | grep -q "$_module" 2> /dev/null ; then
+            /usr/local/php-${_version}/bin/pear install $_module > $log_file 2>&1
+            if [[ "$?" = "0" ]]; then
+               echo_ok
+            else
+               echo_failed
+               error "$(cat $log_file)"
+               if [[ "$_module" = "Net_IDNA2" ]]; then
+                  echononl "\tInstall (beta) Net_IDNA2-0.1.1 .."
+                  /usr/local/php-${_version}/bin/pear install channel://pear.php.net/Net_IDNA2-0.1.1 > $log_file 2>&1
+                  if [ "$?" = "0" ]; then
+                     echo_ok
+                  else
+                     echo_failed
+                     error "$(cat $log_file)"
+                  fi
+               fi
+            fi
+         else
+            echo_skipped
+         fi
+      done
+   done
+fi
 
 
 echo -e "\n\n\t\033[37m\033[1mInstall (global) composer..\033[m\n"
@@ -639,10 +672,15 @@ fi
 
 
 echononl "\tInstall PHP dependencies.."
-#/usr/local/php-${php_latest_ver}/bin/php /usr/local/bin/composer install --no-dev
-su www-data -c"cd ${WEBSITE_BASEDIR}/roundcubemail-${ROUNDCUBE_VERSION}
-   /usr/local/php-${php_latest_ver}/bin/php /usr/local/bin/composer install --no-dev" -s /bin/bash \
-   > $log_file 2>&1
+if $PHP_DEBIAN_INSTALLATION ; then
+   su ${HTTP_USER} -c"cd ${WEBSITE_BASEDIR}/roundcubemail-${ROUNDCUBE_VERSION}
+      php /usr/local/bin/composer install --no-dev" -s /bin/bash \
+      > $log_file 2>&1
+else
+   su ${HTTP_USER} -c"cd ${WEBSITE_BASEDIR}/roundcubemail-${ROUNDCUBE_VERSION}
+      /usr/local/php-${php_latest_ver}/bin/php /usr/local/bin/composer install --no-dev" -s /bin/bash \
+      > $log_file 2>&1
+fi
 if [[ $? -eq 0 ]]; then
       echo_ok
 else
@@ -1253,7 +1291,16 @@ elif [[ "$PHP_TYPE" = "php_fpm" ]]; then
    DocumentRoot "${WEBSITE_BASEDIR}/htdocs/"
 
    <FilesMatch \.php$>
+EOF
+   if $PHP_DEBIAN_INSTALLATION ; then
+      cat <<EOF >> ${APACHE_VHOST_DIR}/${WEBSITE_NAME}.conf 2>> $log_file
+      SetHandler "proxy:unix:/var/run/php5-fpm.sock|fcgi://127.0.0.1"
+EOF
+   else
+      cat <<EOF >> ${APACHE_VHOST_DIR}/${WEBSITE_NAME}.conf 2>> $log_file
       SetHandler "proxy:unix:/tmp/php-${php_latest_ver}-fpm.www.sock|fcgi://127.0.0.1"
+EOF
+   cat <<EOF >> ${APACHE_VHOST_DIR}/${WEBSITE_NAME}.conf 2>> $log_file
    </FilesMatch>
 
    <IfModule dir_module>
@@ -1506,7 +1553,16 @@ elif [[ "$PHP_TYPE" = "php_fpm" ]]; then
    DocumentRoot "${WEBSITE_BASEDIR}/htdocs/"
 
    <FilesMatch \.php$>
+EOF
+   if $PHP_DEBIAN_INSTALLATION ; then
+      cat <<EOF >> ${APACHE_VHOST_DIR}/${WEBSITE_NAME}.conf 2>> $log_file
+      SetHandler "proxy:unix:/var/run/php5-fpm.sock|fcgi://127.0.0.1"
+EOF
+   else
+      cat <<EOF >> ${APACHE_VHOST_DIR}/${WEBSITE_NAME}.conf 2>> $log_file
       SetHandler "proxy:unix:/tmp/php-${php_latest_ver}-fpm.www.sock|fcgi://127.0.0.1"
+EOF
+   cat <<EOF >> ${APACHE_VHOST_DIR}/${WEBSITE_NAME}.conf 2>> $log_file
    </FilesMatch>
 
    <IfModule dir_module>
diff --git a/upgrade_roundcube.sh b/upgrade_roundcube.sh
index 386b719..ddae2b3 100755
--- a/upgrade_roundcube.sh
+++ b/upgrade_roundcube.sh
@@ -354,19 +354,23 @@ fi
 # - Determin PHP of all installed versions
 # -
 echononl "\tGet major version of all installed PHP versions"
-php_major_versions="$(find /usr/local/ -maxdepth 1 -mindepth 1 -type l -name "php-*" -print | cut -d "-" -f2 | sort)"
-if [[  -z "$php_major_versions" ]]; then
-   echo_failed
-   error "Getting version numbers of installed PHP versions failed! No installed PHP versiond found!"
+if $PHP_DEBIAN_INSTALLATION ; then
+   echo_skipped
 else
-   echo_ok
+   php_major_versions="$(find /usr/local/ -maxdepth 1 -mindepth 1 -type l -name "php-*" -print | cut -d "-" -f2 | sort)"
+   if [[  -z "$php_major_versions" ]]; then
+      echo_failed
+      error "Getting version numbers of installed PHP versions failed! No installed PHP versiond found!"
+   else
+      echo_ok
+   fi
 fi
 
 # - Stop all PHP FPM engines
 # -
+echononl "   Stop PHP FPM engine v${_ver}.."
 if [[  -n "$php_major_versions" ]]; then
    for _ver in $php_major_versions ; do
-		echononl "   Stop PHP FPM engine v${_ver}.."
 		if [[ -f "/etc/init.d/php-${_ver}-fpm" ]]; then
 			/etc/init.d/php-${_ver}-fpm stop > $log_file 2>&1
 			if [[ $? -eq 0 ]]; then
@@ -387,6 +391,24 @@ if [[  -n "$php_major_versions" ]]; then
 			echo_skipped
 		fi
 	done
+else
+   if $PHP_DEBIAN_INSTALLATION ; then
+      if [[ -f "/etc/init.d/php5-fpm" ]] ; then
+         /etc/init.d/php5-fpm stop > $log_file 2>&1
+      elif [[ -f "/etc/init.d/php7-fpm" ]] ; then
+         /etc/init.d/php7-fpm stop > $log_file 2>&1
+      else
+         echo_skipped
+      fi
+      if [[ $? -eq 0 ]]; then
+         echo_ok
+      else
+         echo_failed
+         error "$(cat $log_file)"
+      fi
+   else
+      echo_skipped
+   fi
 fi
 
 echo -e "\n\n   \033[37m\033[1mUgrade Roundcube Webmail..\033[m\n"
@@ -524,6 +546,24 @@ if [[  -n "$php_major_versions" ]]; then
 			echo_skipped
 		fi
 	done
+else
+   if $PHP_DEBIAN_INSTALLATION ; then
+      if [[ -f "/etc/init.d/php5-fpm" ]] ; then
+         /etc/init.d/php5-fpm start > $log_file 2>&1
+      elif [[ -f "/etc/init.d/php7-fpm" ]] ; then
+         /etc/init.d/php7-fpm start > $log_file 2>&1
+      else
+         echo_skipped
+      fi
+      if [[ $? -eq 0 ]]; then
+         echo_ok
+      else
+         echo_failed
+         error "$(cat $log_file)"
+      fi
+   else
+      echo_skipped
+   fi
 fi
 
 # - Start Apache Webserver