Pro PHP- Patterns, Frameworks, Testing and More

CHAPTER 19 ■ INTRODUCTION TO WEB SERVICES WITH SOAP^287

Port: This combines a binding with an endpoint and provides the URL where the service

can be located. The port is the actual fully qualified URL to the PHP script that will host

your SOAP server.

Service: This defines a collection of ports that make up your web service.

A WSDL File.

Ignoring any purpose, which will come later, let’s look at a WSDL file created for a method

called demo that takes exactly one string parameter and returns exactly one string value, running on

http://localhost/service.php. Listing 19-1 shows this WSDL file.

■Note URIs in WSDL files are case-sensitive. http://localhost/demo is not the same as http://

localhost/Demo.

Listing 19-1. A Sample WDSL File (demo.wsdl)

<?xml version ="1.0" encoding ="UTF-8" ?>

<definitions name="demo"

targetNamespace="http://localhost/demo"

xmlns:tns="http://localhost/demo"

xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/"

xmlns:soapenc="http://schemas.xmlsoap.org/soap/encoding/"

xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/"

xmlns:xsd="http://www.w3.org/2001/XMLSchema"

xmlns="http://schemas.xmlsoap.org/wsdl/">

<message name="DemoRequest">

<part name="param1" type="xsd:string" />

</message>

<message name="DemoResponse">

<part name="Result" type="xsd:string" />

</message>

<portType name="DemoPortType">

<operation name="Demo">

<input message="tns:DemoRequest" />

<output message="tns:DemoResponse" />

</operation>

</portType>

<binding name="DemoBinding" type="tns:DemoPortType">

<soap:binding style="rpc" transport="http://schemas.xmlsoap.org/soap/http" />

<operation name="Demo">

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