最近在做乐橙的监控设备，第一步通过http post json获取accessToken都失败了

Question

网址：乐橙应用开发指南现在我第一步的获取accessToken都获取不到，我的代码如下：function http_post_json($url, $jsonStr){    $ch = curl_init($url);    curl_setopt($ch, CURLOPT_POST, 1);    curl_setopt($ch, CURLOPT_URL, $url);    curl_setopt($ch, CURLOPT_POSTFIELDS, $jsonStr);    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);    curl_setopt($ch, CURLOPT_HTTPHEADER, array(            'Content-Type: application/json; charset=utf-8',            'Content-Length: ' . strlen($jsonStr)        )    );    $response = curl_exec($ch);    $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);    curl_close($ch);     return array($httpCode, $response);} $url = "https://openapi.lechange.cn:443/openapi/accessToken";$jsonStr = json_encode(array('phone' => '18600000000'));echo $jsonStr;list($returnCode, $returnContent) = http_post_json($url, $jsonStr);运行结果：