What are the best practices for creating SOAP requests and responses in PHP?

When creating SOAP requests and responses in PHP, it is important to follow best practices to ensure compatibility and efficiency. This includes properly formatting the XML structure of the SOAP request and response, handling errors gracefully, and using built-in PHP SOAP functions for easier implementation.

// Create a SOAP client
$client = new SoapClient("example.wsdl");

// Create a SOAP request
$request = array('param1' => 'value1', 'param2' => 'value2');
$response = $client->__soapCall('methodName', array($request));

// Handle SOAP response
if ($response) {
    // Process the response data
    echo $response->result;
} else {
    // Handle SOAP errors
    echo "Error: " . $client->__getLastResponse();
}