<?php
// $Header: $
// Copyright [c] CODE Consulting and Development, s.r.o., Plzen. All rights reserved.
//#region Example
// This example shows how to read and display data of an attribute (value, timestamps, and status code).
 
// Instantiate the client object
$Client = new COM("OpcLabs.EasyOpc.UA.EasyUAClient");
 
// Obtain attribute data. By default, the Value attribute of a node will be read.
try{
	$AttributeData = $Client->Read(
	    "http://opcua.demo-this.com:51211/UA/SampleServer",
	    "nsu=http://test.org/UA/Data/;i=10853"); // or "opc.tcp://opcua.demo-this.com:51210/UA/SampleServer"
}
catch(Exception $e){
	printf($e);
}
 
// Display results
printf("Value: %s\n", $AttributeData->Value);
printf("ServerTimestamp: %s\n", $AttributeData->ServerTimestamp);
printf("SourceTimestamp: %s\n", $AttributeData->SourceTimestamp);
printf("StatusCode: %s\n", $AttributeData->StatusCode);
 
// Example output:
//
//Value: -2.230064E-31
//ServerTimestamp: 11/6/2011 1:34:30 PM
//SourceTimestamp: 11/6/2011 1:34:30 PM
//StatusCode: Good
 
//#endregion Example
?>

C:\Program Files (x86)\OPC Labs QuickOPC 2017.1\ExamplesCom\PHP\Console\UADocExamples>php _EasyUAClient.Read.Main.php
PHP Fatal error:  Uncaught exception 'com_exception' with message 'Source: mscorlib
Description: Length cannot be less than zero.
Parameter name: length' in C:\Program Files (x86)\OPC Labs QuickOPC 2017.1\ExamplesCom\PHP\Console\UADocExamples\_EasyUAClient.Read.Main.php:13
Stack trace:
#0 C:\Program Files (x86)\OPC Labs QuickOPC 2017.1\ExamplesCom\PHP\Console\UADocExamples\_EasyUAClient.Read.Main.php(13): com->Read('http://opcua.de...', 'nsu=http://test...')
#1 {main}
  thrown in C:\Program Files (x86)\OPC Labs QuickOPC 2017.1\ExamplesCom\PHP\Console\UADocExamples\_EasyUAClient.Read.Main.php on line 13

Value: 1.9620245196987E-28 ServerTimestamp: 9/6/2017 3:01:10 PM SourceTimestamp: 9/6/2017 3:01:10 PM StatusCode: Good

exception 'com_exception' with message 'Source: mscorlib
Description: Length cannot be less than zero.
Parameter name: length' in C:\Websites\das\php\update.php:2041
Stack trace:
#0 C:\Websites\das\php\update.php(2041): com->ReadValue('opc.tcp://127.0...', 'ns=5;s=Counter1')
#1 C:\Websites\das\php\update.php(200): ua_read(Object(com), 'opc.tcp://127.0...', 'ns=5;s=Counter1')
#2 C:\Websites\das\php\update.php(26): data_instant()
#3 {main}