implemented basic SoapKernel to transform a SoapRequest to a SoapResponse

Util/OutputBuffer.php

@@ -0,0 +1,33 @@
+<?php
+/*
+ * This file is part of the WebServiceBundle.
+ *
+ * (c) Christian Kerl <christian-kerl@web.de>
+ *
+ * This source file is subject to the MIT license that is bundled
+ * with this source code in the file LICENSE.
+ */
+
+namespace Bundle\WebServiceBundle\Util;
+
+/**
+ * OutputBuffer provides utility methods to work with PHP's output buffer.
+ *
+ * @author Christian Kerl <christian-kerl@web.de>
+ */
+class OutputBuffer
+{
+    /**
+     * Gets the output created by the given callable.
+     *
+     * @param callable $callback A callable to execute
+     *
+     * @return string The output
+     */
+    static public function get($callback)
+    {
+        ob_start();
+        $callback();
+        return ob_get_clean();
+    }
+}