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 OKConnection: closeDate: Mon, 13 Jun 2016 03:25:04 GMTContent-Type: application/json; encoding=utf-8Content-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