An example of PHP calling interface transmitting json data by post method

First, the data is converted into json format, and then the interface is called through curl method and the parameters are passed

The code is as follows:

$keyword = urlencode($_POST['keyword']);
$parameters = json_encode(array('keyWord'=>$keyword,'areaCode'=>'*'));
$post_data['appToken'] = "323ds7674354fds32fdsda60173";// Written casually 
$post_data['parameters'] = $parameters;
$url = 'http://serde.com/compadddvd/index';// Written casually 
$ch = curl_init();
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_POSTFIELDS, $post_data);// Use post Method passes parameters 
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
$response = curl_exec($ch);
curl_close($ch);

After that, the data can be returned.