fixed the examples

examples/example_fc16.php

@@ -1,6 +1,6 @@
 <?php
 
-require_once dirname(__FILE__) . '/../Phpmodbus/ModbusMaster.php';
+use PHPModbus\ModbusMaster;
 
 // Create Modbus object
 $modbus = new ModbusMaster("192.192.15.51", "UDP");
@@ -10,17 +10,16 @@ $data = array(10, -1000, 2000, 3.0);
 $dataTypes = array("WORD", "INT", "DINT", "REAL");
 
 try {
-    // FC16
-    $modbus->writeMultipleRegister(0, 12288, $data, $dataTypes);
-}
-catch (Exception $e) {
-    // Print error information if any
-    echo $modbus;
-    echo $e;
-    exit;
+	// FC16
+	$modbus->writeMultipleRegister(0, 12288, $data, $dataTypes);
+} catch (Exception $e) {
+	// Print error information if any
+	echo $modbus;
+	echo $e;
+	exit;
 }
 
 // Print status information
 echo $modbus;
 
-?>
+?>