I used this server:
byte server[] = {31, 170, 161, 36}; // My webserver IP
with this request
client.println("GET /test.php HTTP/1.0");
client.println("Host: venard.hostzi.com\r\n");
...and it returned, among other things, "A sample string as test message". Is that what it is supposed to say? My web browser says that is correct.