How to Use PHP's SoapClient to Integrate with SOAP Web Services?

How to Integrate PHP SOAP Functionality Using SoapClient

Often, non-Object-Oriented programmers encounter challenges when integrating SOAP functionality into their PHP scripts. Despite having a WSDL file, they may struggle with the correct syntax for invoking SOAP calls.

Setting Up the Connection

To interact with a SOAP service as a client, you can utilize the SoapClient class. Begin by creating an instance of SoapClient with the WSDL file's URL:

$client = new SoapClient("http://example.com/webservices?wsdl");

To retrieve information about available functions and types, use:

var_dump($client->__getFunctions());
var_dump($client->__getTypes());

Constructing the SOAP Call

Now, let's focus on constructing the SOAP call itself. Say you want to invoke the "Function1" function with the following data:

• Contact ID: 100
• Contact Name: John
• General Description: Barrel of Oil
• Amount: 500

The Data Structure

The WSDL document indicates that Contact is a complex type with two properties: id and name.

The Call Syntax

To make the SOAP call with your desired data, you'll need to use the following syntax:

$params = array(
  "Contact" => new Contact(100, "John"),
  "description" => "Barrel of Oil",
  "amount" => 500,
);
$response = $client->__soapCall("Function1", array($params));

This code creates a new instance of the Contact class with the specified ID and name. It then assembles the request parameters into the $params array and invokes the SOAP call using __soapCall.

The response from the SOAP service will be stored in the $response variable. You can inspect the response to obtain the results of the call.

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