What role does the server-side implementation of the requested function play in the success of a SOAP request in PHP?

The server-side implementation of the requested function in a SOAP request plays a crucial role in the success of the request. It is responsible for processing the SOAP request, executing the requested function, and generating the appropriate response. If the server-side implementation is incorrect or incomplete, the SOAP request may fail.

// Example of a server-side implementation of a SOAP request in PHP

// Define the function to be called in the SOAP request
function helloWorld() {
    return "Hello, World!";
}

// Create a new SOAP server
$server = new SoapServer(null, array('uri' => "urn://example"));

// Add the function to the server
$server->addFunction("helloWorld");

// Handle the SOAP request
$server->handle();