为什么PHP + curl，HTTP POST请求返回null？

Question

我很困惑为什么$ response不会返回任何内容，我是新来的请求帮助，

$post = [
        'AreaCode' => '02',
        'PhoneNumber' => '33312733',
        'InquiryBy'   => 'telephone',
    ];

    $ch = curl_init();
     curl_setopt($ch, CURLOPT_URL, 'https://billing.te.eg/api/Account/Inquiry');
     curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
     curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
     curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);
     curl_setopt($ch, CURLOPT_POSTFIELDS, $post);
     curl_setopt($ch, CURLOPT_HTTPHEADER, array(
       'Content-Type:application/json',
       'Access-Control-Allow-Origin: *',
     ));
     curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 10);
     curl_setopt($ch, CURLOPT_TIMEOUT, 10);
     $httpCode = curl_getinfo($ch , CURLINFO_HTTP_CODE); 
     $response = curl_exec($ch);
     if ($response === false) $response = curl_error($ch);
     echo stripslashes($response);
     curl_close($ch);

在邮差中

Answer 1

请添加以下行以定义请求类型（GET / POST / ..），然后尝试：

curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "POST");

Answer 2

将cacert.pem文件保存在根目录并设置curl选项并尝试

http://curl.haxx.se/ca/cacert.pem

curl_setopt ($h, CURLOPT_CAINFO, base_path()."/cacert.pem");