index.php

   <?php
   // Connect to the Modbus IP device
   require_once 'connect_modbus.php';
   $modbus = connect_modbus('192.168.1.1', 502);

   // Read online registers
   require_once 'read_registers.php';
   $registers = read_registers($modbus, 0, 10);

   // Store the data in the MySQL table
   require_once 'store_data.php';
   store_data($registers);

   // Display the data in a table on the web page
   require_once 'display_data.php';
   display_data();

   // Close the Modbus connection
   $modbus->disconnect();
   ?>