curl_exec返回false,无法获取accessToken

Question

        $curl = curl_init();
        /*
        curl_setopt_array($curl,
            array(
                CURLOPT_URL => $url,
                CURLOPT_REFERER => $url,
                CURLOPT_AUTOREFERER => true,
                CURLOPT_RETURNTRANSFER => true,
                CURLOPT_SSL_VERIFYPEER => false,
                CURLOPT_SSL_VERIFYHOST => false,
                CURLOPT_CONNECTTIMEOUT => 1,
                CURLOPT_TIMEOUT => 30,
                CURLOPT_USERAGENT => 'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/34.0.1847.116 Safari/537.36'
            )
        );
        */
        curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
        curl_setopt($curl,CURLOPT_URL,$url);
        curl_setopt($curl,CURLOPT_RETURNTRANSFER,1);
        //curl_setopt($curl, CURLOPT_HTTPHEADER, array('Expect:'));
        //curl_setopt($curl, CURLOPT_HEADER, true);
        
        $res = curl_exec($curl);

没有办法获取accessToken真无奈，难道每次都要通过接口调试工具吗？请问老师正确的打开办法？

• 返回结果:

• • 200 OK

  • Connection: close

  • Date: Mon, 13 Jun 2016 03:25:04 GMT

  • Content-Type: application/json; encoding=utf-8

  • Content-Length: 175

  • {
        "access_token": "####", 
        "expires_in": 7198}
    

• 提示:

• Request successful

Answer 1

找到问题了，返回int(77)  Problem with the SSL CA cert (path? access rights?)linix里面运行了下No package ca-certificate 好吧。curl函数使用环境有问题