if [[ "$PHP_ENGINE" = "FPM" ]] ; then
   if [[ -z "$PHP_VERSION" ]] ; then
      if [[ -z "$VHOST_CONFIG_FILE" ]] ; then
         if $NGINX_IS_ENABLED ; then

            if [[ -f "/etc/nginx/sites-enabled/${WEBSITE}.conf" ]] ; then
               VHOST_CONFIG_FILE="$(realpath "/etc/nginx/sites-enabled/${WEBSITE}.conf")"
            fi

         elif $APACHE2_IS_ENABLED ; then

            if [[ -f "/usr/local/apache2/conf/vhosts/${WEBSITE}.conf.php-fpm" ]] ; then
               VHOST_CONFIG_FILE="/usr/local/apache2/conf/vhosts/${WEBSITE}.conf.php-fpm"
            elif [[ -f "/usr/local/apache2/conf/vhosts/${WEBSITE}.conf" ]] ; then
               VHOST_CONFIG_FILE="/usr/local/apache2/conf/vhosts/${WEBSITE}.conf"
            elif [[ -f "/etc/apache2/sites-enabled/${WEBSITE}.conf" ]] ; then
               VHOST_CONFIG_FILE="/etc/apache2/sites-enabled/${WEBSITE}.conf"
            fi

         fi
      fi
      if [[ -n "$VHOST_CONFIG_FILE" ]] ; then
         PHP_VERSION="$(grep -o -E "^[^#]*php-?[[:digit:]]{1,2}\.[[:digit:]]{1}-fpm" $VHOST_CONFIG_FILE \
                       | grep -o -E "[[:digit:]]{1,2}\.[[:digit:]]{1}")"
      fi
      if [[ -z "$PHP_VERSION" ]] ; then

         if $NGINX_IS_ENABLED ; then
            upstream_handler="$(grep -o -E "^[^#]*fastcgi_pass\s+[^;]+" ${VHOST_CONFIG_FILE} | awk '{print$2}' )"
            for _file in $(ls /etc/nginx/conf.d/) ; do 
               _rp_file="$(realpath "/etc/nginx/conf.d/${_file}")"
               if $(grep -q -E "\s+${upstream_handler}\s*" ${_rp_file} 2> /dev/null) ; then
                  PHP_VERSION="$(grep -o -E "^[^#]*php-?[[:digit:]]{1,2}\.[[:digit:]]{1}-fpm" ${_rp_file} \
                       | grep -o -E "[[:digit:]]{1,2}\.[[:digit:]]{1}")"
                  break
               fi
            done
         fi

         if [[ -z "$PHP_VERSION" ]] ; then

            warn "Cannot determin the PHP version\! Enter it manually"

            main_version_regex="^[[:digit:]]{1,2}\.[[:digit:]]{1}$"

            echo ""
            echo -e "\033[32m--\033[m"
            echo ""
            echo "Enter the PHP main version, e.g. 7.4 or 8.2 .."
            echo ""
            echo ""
            PHP_VERSION=
            while [ "X$PHP_VERSION" = "X" ]
            do
               echononl "   PHP main version: "
               read PHP_VERSION
               if [ "X$PHP_VERSION" = "X" ]; then
                  echo ""
                  echo -e "\033[33m\033[1mInput is required !!\033[m"
                  echo ""
               fi
               if [[ ! $PHP_VERSION =~ $main_version_regex ]] ; then
                  echo ""
                  echo -e "\033[33m\033[1mWrong entry (${PHP_VERSION}) for main PHP version !!\033[m"
                  echo ""
                  PHP_VERSION=
               fi

            done

         fi

      fi
   fi
fi