如何使用此格式在php中传递json文件

$data = array(
   'name' => 'John',
   'age' => 30,
   'email' => 'john@example.com'
);

$jsonData = json_encode($data);

$url = 'http://example.com/api'; // 替换为实际的API地址

$ch = curl_init($url);
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "POST");
curl_setopt($ch, CURLOPT_POSTFIELDS, $jsonData);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, array(
    'Content-Type: application/json',
    'Content-Length: ' . strlen($jsonData))
);

$response = curl_exec($ch);
curl_close($ch);

$url = 'http://example.com/api'; // 替换为实际的API地址

$options = array(
    'http' => array(
        'method'  => 'POST',
        'header'  => "Content-Type: application/json\r\n",
        'content' => $jsonData
    )
);
$context  = stream_context_create($options);
$response = file_get_contents($url, false, $context);

$jsonData = file_get_contents('php://input');
$data = json_decode($jsonData, true);