php如何接支付宝

<?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['total'];
 //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['seller_id']),
 "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;
 }
}

<?php
namespace Home\Controller;
use Think\Controller;
use \Extend\Alipay as Alipays;
class TextController extends Controller {
 public function index(){
 out_trade_no = date('YmdHis');
 _SERVER['HTTP_HOST'];
 out_trade_no,
 'notify_url'=> baseurl.'/index.php/Home/Text/returnurl.html',
 'total'=> 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['out_trade_no'];
 //支付宝交易号
 _GET['trade_no'];
 //交易状态
 _GET['trade_status'];
 if(_GET['trade_status'] == 'TRADE_SUCCESS') {
 //交易成功 
 }else {
 echo "trade_status=".alipay_config = C('alipay');
 //计算得出通知验证结果
 alipay_config);
 alipayNotify->verifyNotify();
 if(out_trade_no = trade_no = trade_status = _POST['trade_status'] == 'TRADE_FINISHED'||$_POST['trade_status'] == 'TRADE_SUCCESS') {
 //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");
 }
 }
}