SoapServer sub class for debugging requests and responses

DebugSoapServer.php

<?php
class DebugSoapServer extends SoapServer
{
    public function handle($request = null)
    {
        // check input param
        if ($request === null) {
            $request = file_get_contents('php://input');
        }

        // store the request string
        $requestSignature = md5($request);
        file_put_contents('/tmp/soap_' . $requestSignature . '_request', $request);

        // start output buffering
        ob_start();

        // finaly call SoapServer::handle() - store result
        $result = parent::handle($request);

        // store the response string
        file_put_contents('/tmp/soap_' . $requestSignature . '_response', ob_get_contents());

        // flush buffer
        ob_flush();

        // return stored soap-call result
        return $result;
    }
}