title: What is the difference between SoapServer features option
body: <p>I am reading the documentation for php class SoapServer but found nothing about description of options which will be passed in SoapServer constructor:     </p>
  
  <p>There is also a features option which can be set to </p>
  
  <pre><code>SOAP_WAIT_ONE_WAY_CALLS, 
  SOAP_SINGLE_ELEMENT_ARRAYS, 
  SOAP_USE_XSI_ARRAY_TYPE.
  </code></pre>
  
  <p>What is the difference between this option values?</p>