PHP example code

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Performing ping request
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GET application/xml Thu, 24 April 2014 10:58:16 GMT x-openapi-date:Thu, 24 April 2014 10:58:16 GMT /openapi/services/rest/utils/v3/ping
HTTP/1.1 200 OK
Date: Thu, 24 Apr 2014 10:58:16 GMT
Server: Apache
Content-Length: 0
Vary: User-Agent
Connection: close