尝试使用 php 发送 POST 请求，无论我做什么，我都会收到“HTTP ERROR 500”

Question

为了发出 HTTP 请求，有人建议我尝试使用 PHP 并给了我一段代码来处理：

$url = 'https://example.com/dashboard/api';
$data = array('to' => PHONE_NUMBER, 'from' => SENDER_ID, 'message' => TEXT, 'email' => EMAIL, 'api_secret' => SECRET, 'unicode' => BOOLEAN, 'id' => IDENTIFIER);

$options = array(
    'http' => array(
        'header'  => "Content-type: application/x-www-form-urlencoded\r\n",
        'method'  => 'POST',
        'content' => http_build_query($data)
    )
);
$context  = stream_context_create($options);
$result = file_get_contents($url, false, $context);
if ($result === FALSE) { /* Handle error */ }

var_dump($result);

所以我拿了代码，编辑了我需要的字段，将它粘贴到一个.php文件中，上传到我的网络服务器（运行 PHP 5.6），然后在尝试运行.php文件时，我得到 HTTP 错误 500。

我是这一切的完全新手，我什至不确定我是否做对了所有事情。

Answer 1

      $url = 'https://domainname.com/dashboard/api';
      $params = array('to' => PHONE_NUMBER, 'from' => SENDER_ID, 'message' => TEXT, 'email' => EMAIL, 'api_secret' => SECRET, 'unicode' => BOOLEAN, 'id' => IDENTIFIER);      
      $query_content = http_build_query($params);
      $context = stream_context_create([
          'http' => [
              'header'  => [
                   'Content-type: application/x-www-form-urlencoded',
                   'Content-Length: ' . strlen($query_content)
              ],
          'method'  => 'POST',
          'content' => $query_content
        ]
      ]);
      $result = file_get_contents($url, false, $context);

Answer 2

$url = 'https://domainname.com/dashboard/api';
$header = [
    'Content-type: application/x-www-form-urlencoded',
];
$params = array('to' => PHONE_NUMBER, 'from' => SENDER_ID, 'message' => TEXT, 'email' => EMAIL, 'api_secret' => SECRET, 'unicode' => BOOLEAN, 'id' => IDENTIFIER);
$c = curl_init();
curl_setopt($c, CURLOPT_URL,$url);
curl_setopt($c, CURLOPT_POST, true);
curl_setopt($c, CURLOPT_POSTFIELDS, $params);
curl_setopt($c, CURLOPT_RETURNTRANSFER, true);
curl_setopt($c, CURLOPT_FOLLOWLOCATION, true);
curl_setopt($c, CURLOPT_HTTPHEADER, $header);
curl_setopt($c, CURLOPT_SSL_VERIFYPEER, false);
$res = curl_exec($c);
var_dump($res);