Add(123, 456)); echo sprintf("ABC + XYZ = %s\r\n", $test->Concat("ABC", "XYZ")); echo sprintf("IV = %d SV = %s\r\n", $test->IV, $test->SV); $test->IV = 123; $test->SV = "ABC"; echo sprintf("IV = %d SV = %s\r\n", $test->IV, $test->SV); ?>