$curl = curl_init();

curl_setopt_array($curl, array(
  CURLOPT_URL => "https://api.smsedge.io/v1/references/functions/",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => "api_key=api-key-here",
  CURLOPT_HTTPHEADER => array(
    "content-type: application/x-www-form-urlencoded"
  ),
));

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}
                        

OkHttpClient client = new OkHttpClient();

MediaType mediaType = MediaType.parse("application/x-www-form-urlencoded");
RequestBody body = RequestBody.create(mediaType, "api_key=api-key-here");
Request request = new Request.Builder()
  .url("https://api.smsedge.io/v1/references/functions/")
  .post(body)
  .addHeader("content-type", "application/x-www-form-urlencoded")
  .build();

Response response = client.newCall(request).execute();
                        

var client = new RestClient("https://api.smsedge.io/v1/references/functions/");
var request = new RestRequest(Method.POST);
request.AddHeader("content-type", "application/x-www-form-urlencoded");
request.AddParameter("", "api_key=api-key-here", ParameterType.RequestBody);
IRestResponse response = client.Execute(request);
                        

import http.client

conn = http.client.HTTPSConnection("https://api.smsedge.io/v1/references/functions/")

payload = "api_key=api-key-here"

headers = {
    'content-type': "application/x-www-form-urlencoded"
}

conn.request("POST", "/api/sms/send", payload, headers)

res = conn.getresponse()
data = res.read()

print(data.decode("utf-8"))
                        

require 'uri'
require 'net/http'

url = URI("https://api.smsedge.io/v1/references/functions/")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
http.verify_mode = OpenSSL::SSL::VERIFY_NONE

request = Net::HTTP::Post.new(url)
request["content-type"] = 'application/x-www-form-urlencoded'
request.body = "api_key=api-key-here"

response = http.request(request)
puts response.read_body