HelloServerWsdl.php - SOAP 1.2 Server Application in WSDL Mode

This section provides a tutorial example on how to write a simple SOAP 1.2 server application in WSDL mode. The HelloServer.php example defines a hello() function, adds it to the SOAP server, waits for the client program to call.

Now let's move forward one step further: creating a SOAP 1.2 server application in WSDL mode. Here is the same hello server modified to work in WSDL mode, HelloServerWdsl.php:

<?php # HelloServerWsdl.php
#- Copyright (c) 2015, HerongYang.com, All Rights Reserved.
#
function hello($someone) { 
   return "Hello " . $someone . "! - With WSDL";
} 
   ini_set("soap.wsdl_cache_enabled", "0"); 
   $server = new SoapServer("http://localhost/Hello.wsdl",
      array('soap_version' => SOAP_1_2));
   $server->addFunction("hello"); 
   $server->handle(); 
?>

Nothing special in the program. The server object is now created with the location of the WSDL document.

Here is the WSDL document, Hello.wsdl

<?xml version="1.0"?>
<definitions name="MyDefinition" 
 targetNamespace="urn:myTargetNamespace"
 xmlns:tns="urn:myTns"   
 xmlns:xsd="http://www.w3.org/2001/XMLSchema" 
 xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/" 
 xmlns="http://schemas.xmlsoap.org/wsdl/">
 <message name="myRequest">
  <part name="reqParam" type="xsd:string"/>
 </message>
 <message name="myResponse">
  <part name="resParam" type="xsd:string"/>
 </message>
 <portType name="MyPortType">
  <operation name="hello">
   <input message="tns:myRequest"/>
   <output message="tns:myResponse"/>
  </operation>
 </portType>
 <binding name="MyBinding" type="tns:MyPortType">
  <soap:binding style="rpc"
   transport="http://schemas.xmlsoap.org/soap/http"/>
  <operation name="hello">
   <soap:operation soapAction=""/>
   <input>
    <soap:body use="encoded"
     namespace="urn:myInputNamespace"
     encodingStyle="http://schemas.xmlsoap.org/soap/encoding/"/>
   </input>
   <output>
    <soap:body use="encoded"
     namespace="urn:myOutputNamespace"
     encodingStyle="http://schemas.xmlsoap.org/soap/encoding/"/>
   </output>
  </operation>
 </binding>
 <service name="MyService">
  <documentation>Returns a greeting string.
  </documentation>
  <port name="MyPort" binding="tns:MyBinding">
   <soap:address
  location="http://localhost/HelloServerWsdl.php"/>
  </port>
 </service>
</definitions>

The WSDL document looks complicated. But it actually very simple to understand, as long as you remember the following points:

To install HelloServerWsdl.php to my IIS server, copy these two files to the IIS document directory:

>copy HelloServerWsdl.php \inetpub\wwwroot
>copy Hello.wsdl \inetpub\wwwroot

Of course, we need to modify out hello client program as, HelloClientWsdl.php:

<?php # HelloClientWsdl.php
#- Copyright (c) 2015, HerongYang.com, All Rights Reserved.
#
   $client = new SoapClient("http://localhost/Hello.wsdl",
      array('soap_version' => SOAP_1_2,'trace' => 1 ));

   echo("\nDumping client object functions:\n");
   var_dump($client->__getFunctions());

   $return = $client->__soapCall("hello",array("world"));
   echo("\nReturning value of __soapCall() call: ".$return);

#   $return = $client->hello("world");
#   echo("\nReturning value: ".$return);

   echo("\nDumping request headers:\n" 
      .$client->__getLastRequestHeaders());

   echo("\nDumping request:\n".$client->__getLastRequest());

   echo("\nDumping response headers:\n"
      .$client->__getLastResponseHeaders());

   echo("\nDumping response:\n".$client->__getLastResponse());
?>

When you are ready to test, run HelloClientWsdl.php. You will get:

Dumping client object functions:
array(1) {
  [0]=>
  string(30) "string hello(string $reqParam)"
}

Returning value of __soapCall() call: Hello world! - With WSDL

Dumping request headers:
POST /HelloServerWsdl.php HTTP/1.1
Host: localhost
Connection: Keep-Alive
User-Agent: PHP SOAP 0.1
Content-Type: application/soap+xml; charset=utf-8; action=""
Content-Length: 457

Dumping request:
<?xml version="1.0" encoding="UTF-8"?>
<env:Envelope
 xmlns:env="http://www.w3.org/2003/05/soap-envelope" 
 xmlns:ns1="urn:myInputNamespace" 
 xmlns:xsd="http://www.w3.org/2001/XMLSchema" 
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
 xmlns:enc="http://www.w3.org/2003/05/soap-encoding">
 <env:Body>
  <ns1:hello
   env:encodingStyle="http://www.w3.org/2003/05/soap-encoding">
   <reqParam xsi:type="xsd:string">world</reqParam>
  </ns1:hello>
 </env:Body>
</env:Envelope>

Dumping response headers:
HTTP/1.1 200 OK
Server: Microsoft-IIS/5.1
Connection: close
Content-Type: application/soap+xml; charset=utf-8
X-Powered-By: PHP/5.0.4
Content-Length: 573

Dumping response:
<?xml version="1.0" encoding="UTF-8"?>
<env:Envelope
 xmlns:env="http://www.w3.org/2003/05/soap-envelope" 
 xmlns:ns1="urn:myOutputNamespace" 
 xmlns:xsd="http://www.w3.org/2001/XMLSchema" 
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
 xmlns:enc="http://www.w3.org/2003/05/soap-encoding">
 <env:Body xmlns:rpc="http://www.w3.org/2003/05/soap-rpc">
  <ns1:helloResponse 
   env:encodingStyle="http://www.w3.org/2003/05/soap-encoding">
   <rpc:result>resParam</rpc:result>
   <resParam xsi:type="xsd:string">Hello world! - With WSDL</resParam>
  </ns1:helloResponse>
 </env:Body>
</env:Envelope>

Anything interesting here? Yes. Some names defined in the WSDL document did show up in the SOAP request message and response message, like: "urn:myInputNamespace", "reqParam", "urn:myOutputNamespace", etc.

Last update: 2015.

Table of Contents

 About This Book

 Introduction and Installation of PHP 7.0

 PHP Script File Syntax

 PHP Data Types and Data Literals

 Variables, References, and Constants

 Expressions, Operations and Type Conversions

 Conditional Statements - "if" and "switch"

 Loop Statements - "while", "for", and "do ... while"

 Function Declaration, Arguments, and Return Values

 Arrays - Ordered Maps

 Configuring and Sending out Emails

 Retrieving Information from HTTP Requests

 Creating and Managing Sessions in PHP Scripts

 Sending and Receiving Cookies in PHP Scripts

 Controlling HTTP Response Header Lines in PHP Scripts

 MySQL Server Connection and Access Functions

 Functions to Manage Directories, Files and Images

 SOAP Extension Function and Calling Web Services

SOAP Server Functions and Examples

 SoapServer - SOAP Server Class and Functions

 HelloServer.php - First SOAP Server Application

 HelloServer12.php - First SOAP 1.2 Server Application

HelloServerWsdl.php - SOAP 1.2 Server Application in WSDL Mode

 Localization Overview of Web Applications

 Using Non-ASCII Characters in HTML Documents

 Using Non-ASCII Characters as PHP Script String Literals

 Receiving Non-ASCII Characters from Input Forms

 "mbstring" Extension and Non-ASCII Encoding Management

 Managing Non-ASCII Character Strings with MySQL Servers

 Introduction of Class and Object

 Integrating PHP with Apache Web Server

 Outdated Tutorials

 References

 PDF Printing Version