<?php

$curl = curl_init();

curl_setopt_array($curl, array(
  CURLOPT_URL => "https://v2.alapi.cn/api/qr",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => "token=用户中心获取token&content=https://www.alapi.cn&size=150&format=png&return=json",
  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, "token=用户中心获取token&content=https://www.alapi.cn&size=150&format=png&return=json");
Request request = new Request.Builder()
  .url("https://v2.alapi.cn/api/qr")
  .post(body)
  .addHeader("Content-Type", "application/x-www-form-urlencoded")
  .build();

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

import requests

url = "https://v2.alapi.cn/api/qr"

payload = "token=用户中心获取token&content=https://www.alapi.cn&size=150&format=png&return=json"
headers = {'Content-Type': "application/x-www-form-urlencoded"}

response = requests.request("POST", url, data=payload, headers=headers)

print(response.text)

OkHttpClient client = new OkHttpClient();

MediaType mediaType = MediaType.parse("application/x-www-form-urlencoded");
RequestBody body = RequestBody.create(mediaType, "token=用户中心获取token&content=https://www.alapi.cn&size=150&format=png&return=json");
Request request = new Request.Builder()
  .url("https://v2.alapi.cn/api/qr")
  .post(body)
  .addHeader("Content-Type", "application/x-www-form-urlencoded")
  .build();

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

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io/ioutil"
)

func main() {

	url := "https://v2.alapi.cn/api/qr"

	payload := strings.NewReader("token=用户中心获取token&content=https://www.alapi.cn&size=150&format=png&return=json")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Content-Type", "application/x-www-form-urlencoded")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := ioutil.ReadAll(res.Body)

	fmt.Println(res)
	fmt.Println(string(body))

}