/**

 * 支付宝支付

 */

class  Alipay

{

    private $config =[

        "app_id"        => "************",   //支付宝APPid

        "rsaPrivateKey" => "************",   //支付宝私钥

        "rsaPublicKey"  => "************",   //支付宝公钥

        "charset"       => "utf-8",

        "sign_type"     => "RSA2",

        "version"       => "1.0",

    ];

    private $submitUrl = "https://openapi.alipay.com/gateway.do" ;//提交地址

    public $calltype = "app";//pc电脑端 app 手机和app端公用

    public $submit_auto=true;

    public function index($data)

    {

        $calltype=$this->calltype;

        return $this->$calltype($data);

    }

    public function app($data)

    {

        $return_url=$data['return_url'];

        $notify_url=$data['notify_url'];

        $subject=$data['subject'];

        $order_sn=$data['order_sn'];

        $total=$data['total'];

        $biz_content=[

            'body'=>'',

            'subject'=>$subject,

            'out_trade_no'=>$order_sn,

            'timeout_express'=>'30m',

            'total_amount'=>$total,

            'product_code'=>'QUICK_MSECURITY_PAY',

        ];

        $postdata=[

            'app_id'=>$this->config['app_id'],

            'method'=>'alipay.trade.app.pay',

            'format'=>'json',

            'charset'=>$this->config['charset'],

            'sign_type'=>$this->config['sign_type'],

            'sign'=>'',

            'timestamp'=>date('Y-m-d H:i:s'),

            'version'=>'1.0',

            'notify_url'=>$notify_url,

            'biz_content'=>json_encode($biz_content),

        ];

        $signdata=$this->alisign($postdata);

        $str=$this->keyandvalStr($signdata,1);

        //返回链接不能带官方https链接

        return $str;

    }

    public function pc($data)

    {

        $return_url=$data['return_url'];

        $notify_url=$data['notify_url'];

        $biz_content=[

            "total_amount"=>$data['total'],

            "product_code"=>"FAST_INSTANT_TRADE_PAY",

            "subject"=>$data['subject'],

            "out_trade_no"=>$data['order_sn'],

            "goods_type"=>1,//商品类型 0虚拟商品 1实物商品

        ];

        $post=[

            'app_id'=>$this->config['app_id'],

            'method'=>'alipay.trade.page.pay',

            'format'=>'JSON',

            'return_url'=>$return_url,

            'charset'=>$this->config['charset'],

            'sign_type'=>$this->config['sign_type'],

            // 'sign'=>$sign,

            'timestamp'=>date('Y-m-d H:i:s'),

            'version'=>$this->config['version'],

            'notify_url'=>$notify_url,

            'biz_content'=>json_encode($biz_content),

        ];

        $signdata=$this->alisign($post);

        $html=$this->formsubmithtml($this->submitUrl,$signdata);

        return $html;

    }

    public function mobile($data)

    {

        $return_url=$data['return_url'];

        $notify_url=$data['notify_url'];

        $biz_content=[

            "total_amount"=>$data['total'],

            "product_code"=>"QUICK_WAP_WAY",

            "subject"=>$data['subject'],

            "out_trade_no"=>$data['order_sn'],

            "goods_type"=>1,//商品类型 0虚拟商品 1实物商品

        ];

        $post=[

            'app_id'=>$this->config['app_id'],

            'method'=>'alipay.trade.wap.pay',

            'format'=>'JSON',

            'return_url'=>$return_url,

            'charset'=>$this->config['charset'],

            'sign_type'=>$this->config['sign_type'],

            // 'sign'=>$sign,

            'timestamp'=>date('Y-m-d H:i:s'),

            'version'=>$this->config['version'],

            'notify_url'=>$notify_url,

            'biz_content'=>json_encode($biz_content),

        ];

        $signdata=$this->alisign($post);

        $str=$this->keyandvalStr($signdata,1);

        $url="https://openapi.alipay.com/gateway.do?".$str;

        return $url;

    }

    public function alisign($data)

    {

        $rsaPrivateKey=$this->config['rsaPrivateKey'];

        $buff = "";

        ksort($data);

        $buff=$this->keyandvalStr($data);

        $str  = chunk_split($rsaPrivateKey, 64, "\n");

        $res = "-----BEGIN RSA PRIVATE KEY-----\n$str-----END RSA PRIVATE KEY-----\n";

        $sign=$this->ras2Sign($buff,$res);

        $data['sign']=$sign;

        return $data;

    }

    function keyandvalStr($data,$flg=0)

    {

        $buff="";

        foreach ($data as $k => $v) {

            if($flg!=0 && $v != "" && !is_array($v))

            {

                $v=urlencode($v);

                $buff .= $k . "=" . $v . "&";

            }else{

                if($k != "sign" && $v != "" && !is_array($v)){

                    $buff .= $k . "=" . $v . "&";

                }

            }

        }

        $buff = trim($buff, "&");

        return $buff;

    }

    function ras2Sign($buff,$res)

    {

        $sign='';

        openssl_sign($buff, $sign, $res, OPENSSL_ALGO_SHA256);

        $sign = base64_encode($sign);

        return $sign;

    }

    function formsubmithtml($action,$data)

    {

        $sHtml = "<form id='alipaysubmit' name='alipaysubmit' action='".$action."' method='POST'>";

        foreach ($data as $key => $value) {

            $val = str_replace("'","&apos;",$value);

            $sHtml.= "<input type='hidden' name='".$key."' value='".$val."'/>";

        }

        $sHtml = $sHtml."<input type='submit' class='paysubmit' value='ok' ></form>";

        if($this->submit_auto==true)

        {

            $sHtml = $sHtml."<script>document.forms['alipaysubmit'].submit();</script>";

        }

        return $sHtml;

    }

}

use pay\Alipay;

    $callD=[

        'return_url' => '支付完成跳转路径',

        'notify_url' => '回调路径',

        'total'      => '支付总额',

        'subject'    => '支付说明',

        'order_sn'   => '生成订单号',

    ];

    $url=$this->Alipay($callD);

    public function Alipay($data,$flg=true)

    {

        $pay = new Alipay();

        $pay->calltype='app';

        $pay->submit_auto=$flg;

        $pay=$pay->index($data);

        return $pay;

    }