How to connect Alipay in php

First import Alipay's PHP SDK, download address, download mobile payment (SDK & DEMO download) in the Alipay Document Center, unzip and open the server demo->readme.txt

I kept it (recommended learning: PHP video tutorial)

Renamed to

Add namespaces to these five files respectively

Change the namespaces of these four files to

Alipay.class.php

<?php
namespace Extend\Alipay;
class Alipay {
    public function pay(args){
        /**************************请求参数**************************/
        //支付类型
    notify_url = return_url = out_trade_no = subject = "测试";
    //必填
    //付款金额
    args[&#39;total&#39;];
    //必填
    //订单描述
    anti_phishing_key = "";
    //若要使用请调用类文件submit中的query_timestamp函数
    //客户端的IP地址
    parameter = array(
        "service" => "create_direct_pay_by_user",
        "partner" => trim(alipay_config[&#39;seller_id&#39;]),
        "payment_type"  => notify_url,
        "return_url"    => out_trade_no,
        "subject"       => total_fee,
        "body"  => show_url,
        "anti_phishing_key"     => exter_invoke_ip,
        "_input_charset"        => trim(strtolower(alipaySubmit = new lib\AlipaySubmit(html_text = parameter,"get", "确认");
        echo $html_text;
    }
}

Configure parameters in the config.php configuration file

Then create a new controller TextController. class.php

<?php
namespace Home\Controller;
use Think\Controller;
use \Extend\Alipay as Alipays;
class TextController extends Controller {
    public function index(){
        out_trade_no = date(&#39;YmdHis&#39;);
        _SERVER[&#39;HTTP_HOST&#39;];
        out_trade_no,
            &#39;notify_url&#39;=> baseurl.&#39;/index.php/Home/Text/returnurl.html&#39;,
            &#39;total&#39;=> s = new Alipays\Alipay();
        args);
    }
    // 同步跳转
    public function returnurl(){
        alipayNotify = new Alipays\lib\AlipayNotify(verify_result = verify_result) {//验证成功
            //商户订单号
            _GET[&#39;out_trade_no&#39;];
            //支付宝交易号
            _GET[&#39;trade_no&#39;];
            //交易状态
            _GET[&#39;trade_status&#39;];
            if(_GET[&#39;trade_status&#39;] == &#39;TRADE_SUCCESS&#39;) {
                //交易成功                
            }else {
              echo "trade_status=".alipay_config = C(&#39;alipay&#39;);
        //计算得出通知验证结果
        alipay_config);
        alipayNotify->verifyNotify();
        if(out_trade_no = trade_no = trade_status = _POST[&#39;trade_status&#39;] == &#39;TRADE_FINISHED&#39;||$_POST[&#39;trade_status&#39;] == &#39;TRADE_SUCCESS&#39;) {
              //交易成功
            }
            echo "success";     //请不要修改或删除
            
        }
        else {
            //验证失败
            echo "fail";
            //调试用，写文本函数记录程序运行情况是否正常
            //logResult("这里写入想要调试的代码变量值，或其他运行的结果记录");
        }
    }
}

Then

This will successfully complete the simple payment function

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