微信H5支付，从第三方手机浏览器中直接打开支付页面

2023-11-30 08:30:22

首先在商户平台通开H5支付功能，然后帮后绑定，支付完成之后需要跳转的地址，开通之后就可以开发H5支付；

首先是签名，卧槽，说到这个就想骂人，

官方文档的解说；文科生哪能看得懂什么是集合；

下面就来签名：

<?php

//生成随机字符串
function getNonceNum($numLen=16){
    $chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
    $str = "";
    for ($i = 0; $i < $numLen; $i++) {
      $str .= substr($chars, mt_rand(0, strlen($chars) - 1), 1);
    }
    return $str;
}

//获取用户ip地址
function get_client_ip(){
    $cip = "unknown";
    if($_SERVER[‘REMOTE_ADDR‘]){
        $cip = $_SERVER[‘REMOTE_ADDR‘];
    }elseif(getenv("REMOTE_ADDR")){
        $cip = getenv("REMOTE_ADDR");
    }
    return $cip;
}

$getNonceNumstring = getNonceNum();
$out_trade_no =  date("Ymd").getNonceNum();
$ip = get_client_ip();

$param[‘appid‘]                = "############";
$param[‘mch_id‘]            = ""############";";
$param[‘nonce_str‘]         = $getNonceNumstring;
$param[‘body‘]                 = "###";
$param[‘out_trade_no‘]         = $out_trade_no;
$param[‘total_fee‘]         = 1;
$param[‘spbill_create_ip‘]     = $ip;
$param[‘notify_url‘]         = "http://wxpay.wxutil.com/pub_v2/pay/notify.v2.php";
$param[‘trade_type‘]         = "MWEB";
$param[‘scene_info‘]         = ‘{"h5_info": "h5_info" {"type": "IOS","app_name": "h5支付测试","bundle_id": ""}}‘;

//字典排序
ksort($param);

$sign_raw = "";
foreach($param as $k => $v){
    $sign_raw .= $k."=".$v."&";
}
$sign_raw .= "key=############";

//生成签名
$sign = strtoupper(md5($sign_raw));

将上面的###替换成你们的参数；太敏感就不贴出来了

然后就是发送xml数据请求接口；

$xml = <<<EOF
<xml>
<appid>###</appid>
<body>###</body>
<mch_id>###</mch_id>
<nonce_str>$getNonceNumstring</nonce_str>
<notify_url>http://wxpay.wxutil.com/pub_v2/pay/notify.v2.php</notify_url>
<out_trade_no>$out_trade_no</out_trade_no>
<spbill_create_ip>$ip</spbill_create_ip>
<total_fee>1</total_fee>
<trade_type>MWEB</trade_type>
<scene_info>{"h5_info": "h5_info" {"type": "IOS","app_name": "h5支付测试","bundle_id": ""}}</scene_info>
<sign>$sign</sign>
</xml>
EOF;

$url = "https://api.mch.weixin.qq.com/pay/unifiedorder";

//调用接口，返回xml数据包含跳转url；
$result = postXmlCurl($xml, $url);


//解析xml
$xml = simplexml_load_string($result);
$bigarr = array();

//循环生成数组
foreach($xml->children() as $child){
    $key =  $child->getName();
    $bigarr["$key"] = "$child";//必须加引号
}
$tiaozhuanurl = $bigarr[‘mweb_url‘]."&redirect_url=####";

?>



<a href="<?php echo $tiaozhuanurl;?>">
<h1>h5支付</h1>
</a>

<?php

function postXmlCurl($xml, $url, $useCert = false, $second = 30){        
    $ch = curl_init();
    //设置超时
    curl_setopt($ch, CURLOPT_TIMEOUT, $second);
    
    
    curl_setopt($ch,CURLOPT_URL, $url);
    if(stripos($url,"https://")!==FALSE){
        curl_setopt($ch, CURLOPT_SSLVERSION, CURL_SSLVERSION_TLSv1);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);
    }else{
        curl_setopt($ch,CURLOPT_SSL_VERIFYPEER,TRUE);
        curl_setopt($ch,CURLOPT_SSL_VERIFYHOST,2);//严格校验
    } 
    //设置header
    curl_setopt($ch, CURLOPT_HEADER, FALSE);
    //要求结果为字符串且输出到屏幕上
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);

    if($useCert == true){
        //设置证书
        //使用证书：cert 与 key 分别属于两个.pem文件
        curl_setopt($ch,CURLOPT_SSLCERTTYPE,‘PEM‘);
        curl_setopt($ch,CURLOPT_SSLCERT, "###.pem");
        curl_setopt($ch,CURLOPT_SSLKEYTYPE,‘PEM‘);
        curl_setopt($ch,CURLOPT_SSLKEY, "###.pem");
        
        curl_setopt($ch, CURLOPT_CAINFO, "###.pem‘); 
    }
    //post提交方式
    curl_setopt($ch, CURLOPT_POST, TRUE);
    curl_setopt($ch, CURLOPT_POSTFIELDS, $xml);
    //运行curl
    $data = curl_exec($ch);
    //返回结果
    if($data){
        curl_close($ch);
        return $data;
    } else { 
        $error = curl_errno($ch);
        curl_close($ch);
        echo "error";
    }
}

其中要注意的就是xml解析；这个不需要证书；

微信H5支付，从第三方手机浏览器中直接打开支付页面

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