Curl does not respond in the phpstudy integrated environment?

<code>            $url="https://api.shanbay.com/bdc/search/?word=hello";
            $ch=curl_init();
            $timeout=5;
            curl_setopt($ch,CURLOPT_URL,$url);
            curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);
            curl_setopt($ch,CURLOPT_CONNECTTIMEOUT,$timeout);
            $data=curl_exec($ch);
            curl_close($ch);</code>

This is my code. I use the phpstudy integrated environment. Curl has been extended in the php extension. The php version is 5.6. There is no error message on the page. Does anyone know what the problem is?