php curl请求什么都不返回

Question

i am using codeigniter and my code is as follows :

Controller :

    $json_string = 'http://maps.googleapis.com/maps/api/directions/json?origin=' . $user_addr . '&destination=' . $vendor_city .'&mode=Montreal';

    $json = $this->curl_get_contents($json_string);


    $obj = json_decode($json, true);
    $this->load->view('get_direction_pg',$obj);

public function curl_get_contents($url)
{
    $ch = curl_init($url);

    if ($ch == FALSE) {
        return array('error' =>"failed");
    }else{
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);

        curl_setopt($ch, CURLOPT_VERBOSE, 0);

        $result = curl_exec($ch);
        return $result;
    }


}

and it if i access var_dump($routes);

it says,

undefined variable routes.

Answer 1

try using this: i.e. encoding the vars - before putting into url

$json_string = 'http://maps.googleapis.com/maps/api/directions/json?origin=' . urlencode($user_addr) . '&destination=' . urlencode($vendor_city) .'&mode=Montreal';

the parameters should be encoded for url, otherwise it is being invalid, and hence you are getting that error