Overtime Function - PHP

 public function addOvertime(){

        $_nic = $this->input->post('nic');
        $_ward = $this->input->post('ward');
        $_name = $this->input->post('name');

        $_fromdate = $this->input->post('fromdate');
        $_frommonth = $this->input->post('frommonth');
        $_fromyear = $this->input->post('fromyear');

        $_todate = $this->input->post('todate');
        $_tomonth = $this->input->post('tomonth');
        $_toyear = $this->input->post('toyear');

        $_fromtime = $this->input->post('fromtime');
        $_totime = $this->input->post('totime');
        $_hours = $this->input->post('hours');
        $_fromduration = $this->input->post('fromduration');
        $_toduration = $this->input->post('toduration');


        $_serviceUrl = "http://localhost:8080/HIS/rest/overtime/insert";


        $_curl = curl_init($_serviceUrl);

        $person = array('nic' => $_nic,
                        'name' => $_name,
                        'ward' => $_ward,

                        'fromdate' => $_fromdate,
                        'frommonth' => $_frommonth,
                        'fromyear' => $_fromyear,
                        'fromtime' => $_fromtime,

                        'todate' => $_todate,
                        'tomonth' => $_tomonth,
                        'toyear' => $_toyear,
                        'totime' => $_totime,

                        'hours' => $_hours,
                        'fromduration' => $_fromduration,
                        'toduration' => $_toduration);

        $_dataString = json_encode($person);

        curl_setopt($_curl, CURLOPT_CUSTOMREQUEST, "POST");
        curl_setopt($_curl, CURLOPT_POSTFIELDS, $_dataString);
        curl_setopt($_curl, CURLOPT_RETURNTRANSFER, true);
        curl_setopt(
                $_curl, CURLOPT_HTTPHEADER, array(
            'Content-Type: application/json',
            'Content-Length: ' . strlen($_dataString))
        );

        $_result = curl_exec($_curl);
        echo $_result;


    }