erp/core/CoreApp/controllers/Notify.php

<?php 
defined('BASEPATH') OR exit('No direct script access allowed');
/**
 * 此类为了处理各个平台订单统一获取订单的相关信息
 */
class Notify extends Start_Controller {
	public function __construct(){
		parent::__construct();
		$this->load->library('session');
		
	}
    //定义方法的调用规则 获取URI第二段值
    public function _remap($arg,$arg_array)
    {
        if($arg == 'smt')//添加
        {
            $this->_smt();
        }
        else
        {
            exit('No direct script access allowed');
        }
    }
    public function _smt(){
        $appkey = '26004389';
	    $secretKey = 'd880d725c67b449c8a601e9b0766955d';
        $code = isset($_GET['code']) ? $_GET['code'] : '';

    //    $code = $_POST['code'] ?? $authCode;
        
        // 构建请求参数
        $params = [
            'grant_type' => 'authorization_code',
            'client_id' => $appkey,
            'client_secret' => $secretKey,
            'code' => $code,
            'redirect_uri' => "https://1.wepolicy.cn/notify/smt"
        ];
        
        // 发送POST请求
        $ch = curl_init('https://api.aliexpress.com/token');
        curl_setopt($ch, CURLOPT_POST, true);
        curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($params));
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_HTTPHEADER, ['Content-Type: application/x-www-form-urlencoded']);
        
        $response = curl_exec($ch);
        $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
        
        if (curl_errno($ch)) {
            throw new Exception('cURL Error: ' . curl_error($ch));
        }
        
        curl_close($ch);
        
        // 处理响应
        $data = json_decode($response, true);
        echo "<pre>";
        var_dump($data);

    }

  //  https://api-sg.aliexpress.com/oauth/authorize?response_type=code&force_auth=true&redirect_url=https://1.wepolicy.cn/notify/smt&client_id=26004389
    
}