微信公众号的普通微信支付功能做个简单的解释吧

微信公众中难免要用到微信支付,今天就来总结一下吧
好了,直接上代码吧(php代码哦)
创建一个文件夹用来配置公众号的信息

class WxPayConf_pub
{
    //=======【基本信息设置】=====================================
    //公众号的appid
    const APPID = '';
    //受理商ID,身份标识
    const MCHID = '45524552';
    //商户支付密钥Key。审核通过后,在微信发送的邮件中查看
    const KEY = '';
    //公众号的appsecret
    const APPSECRET = '';
    //=======【JSAPI路径设置】===================================
    //获取access_token过程中的跳转uri,通过跳转将code传入jsapi支付页面
    const JS_API_CALL_URL = 'http://www.mtjr666.pw/pay/pay.php';
    //=======【证书路径设置】=====================================
    //证书路径,注意应该填写绝对路径
    const SSLCERT_PATH = /WxPayPubHelper/cacert/apiclient_cert.pem';
    const SSLKEY_PATH = /WxPayPubHelper/cacert/apiclient_key.pem';
    //=======【异步通知url设置】===================================
    //异步通知url,商户根据实际开发过程设定
    const NOTIFY_URL = '../pay/demo/notify_url.php';
    //=======【curl超时设置】===================================
    //本例程通过curl使用HTTP POST方法,此处可修改其超时时间,默认为30秒
    const CURL_TIMEOUT = 15;
}

错误信息


class  SDKRuntimeException extends Exception {
    public function errorMessage()
    {
        return $this->getMessage();
    }

}

支付接口封装


    include_once("SDKRuntimeException.php");
    include_once("WxPay.pub.config.php");
class Common_util_pub
{
    function __construct() {
    }

    function trimString($value)
    {
        $ret = null;
        if (null != $value) 
        {
            $ret = $value;
            if (strlen($ret) == 0) 
            {
                $ret = null;
            }
        }
        return $ret;
    }

    /**
     *  作用:产生随机字符串,不长于32位
     */
    public function createNoncestr( $length = 32 ) 
    {
        $chars = "abcdefghijklmnopqrstuvwxyz0123456789";  
        $str ="";
        for ( $i = 0; $i < $length; $i++ )  {  
            $str.= substr($chars, mt_rand(0, strlen($chars)-1), 1);  
        }  
        return $str;
    }

    /**
     *  作用:格式化参数,签名过程需要使用
     */
    function formatBizQueryParaMap($paraMap, $urlencode)
    {
        $buff = "";
        ksort($paraMap);
        foreach ($paraMap as $k => $v)
        {
            if($urlencode)
            {
               $v = urlencode($v);
            }
            //$buff .= strtolower($k) . "=" . $v . "&";
            $buff .= $k . "=" . $v . "&";
        }
        $reqPar;
        if (strlen($buff) > 0) 
        {
            $reqPar = substr($buff, 0, strlen($buff)-1);
        }
        return $reqPar;
    }

    /**
     *  作用:生成签名
     */
    public function getSign($Obj)
    {
        foreach ($Obj as $k => $v)
        {
            $Parameters[$k] = $v;
        }
        //签名步骤一:按字典序排序参数
        ksort($Parameters);
        $String = $this->formatBizQueryParaMap($Parameters, false);
        //echo '【string1】'.$String.'</br>';
        //签名步骤二:在string后加入KEY
        $String = $String."&key=".WxPayConf_pub::KEY;
        //echo "【string2】".$String."</br>";
        //签名步骤三:MD5加密
        $String = md5($String);
        //echo "【string3】 ".$String."</br>";
        //签名步骤四:所有字符转为大写
        $result_ = strtoupper($String);
        //echo "【result】 ".$result_."</br>";
        return $result_;
    }

    /**
     *  作用:array转xml
     */
    function arrayToXml($arr)
    {
        $xml = "<xml>";
        foreach ($arr as $key=>$val)
        {
             if (is_numeric($val))
             {
                $xml.="<".$key.">".$val."</".$key.">"; 

             }
             else
                $xml.="<".$key."><![CDATA[".$val."]]></".$key.">";  
        }
        $xml.="</xml>";
        return $xml; 
    }

    /**
     *  作用:将xml转为array
     */
    public function xmlToArray($xml)
    {       
        //将XML转为array        
        $array_data = json_decode(json_encode(simplexml_load_string($xml, 'SimpleXMLElement', LIBXML_NOCDATA)), true);     
        return $array_data;
    }

    /**
     *  作用:以post方式提交xml到对应的接口url
     */
    public function postXmlCurl($xml,$url,$second=30)
    {       
        //初始化curl        
        $ch = curl_init();
        //设置超时
        //个人加入 同821 行一样
        curl_setopt($ch, CURLOPT_TIMEOUT, $second);

       //这里设置代理,如果有的话
        //curl_setopt($ch,CURLOPT_PROXY, '8.8.8.8');
        //curl_setopt($ch,CURLOPT_PROXYPORT, 8080);
        curl_setopt($ch,CURLOPT_URL, $url);
        curl_setopt($ch,CURLOPT_SSL_VERIFYPEER,FALSE);
        curl_setopt($ch,CURLOPT_SSL_VERIFYHOST,FALSE);
        //设置header
        curl_setopt($ch, CURLOPT_HEADER, FALSE);
        //要求结果为字符串且输出到屏幕上
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
        //post提交方式
        curl_setopt($ch, CURLOPT_POST, TRUE);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $xml);
        //运行curl
        $data = curl_exec($ch);
        curl_close($ch);
        //返回结果
        if($data)
        {if(gettype($ch) == 'resource'){
            curl_close($ch);
            return $data;
        }
        }
        else 
        { 
            $error = curl_errno($ch);
            echo "curl出错,错误码:$error"."<br>"; 
            echo "<a href='http://curl.haxx.se/libcurl/c/libcurl-errors.html'>错误原因查询</a></br>";
            curl_close($ch);
            return false;
        }

        return $data;
    }

    /**
     *  作用:使用证书,以post方式提交xml到对应的接口url
     */
    function postXmlSSLCurl($xml,$url,$second=30)
    {
        $ch = curl_init();
        //超时时间
        curl_setopt($ch,CURLOPT_TIMEOUT,$second);
        //这里设置代理,如果有的话
        //curl_setopt($ch,CURLOPT_PROXY, '8.8.8.8');
        //curl_setopt($ch,CURLOPT_PROXYPORT, 8080);
        curl_setopt($ch,CURLOPT_URL, $url);
        curl_setopt($ch,CURLOPT_SSL_VERIFYPEER,FALSE);
        curl_setopt($ch,CURLOPT_SSL_VERIFYHOST,FALSE);
        //设置header
        curl_setopt($ch,CURLOPT_HEADER,FALSE);
        //要求结果为字符串且输出到屏幕上
        curl_setopt($ch,CURLOPT_RETURNTRANSFER,TRUE);
        //设置证书
        //使用证书:cert 与 key 分别属于两个.pem文件
        //默认格式为PEM,可以注释
        curl_setopt($ch,CURLOPT_SSLCERTTYPE,'PEM');
        curl_setopt($ch,CURLOPT_SSLCERT, WxPayConf_pub::SSLCERT_PATH);
        //默认格式为PEM,可以注释
        curl_setopt($ch,CURLOPT_SSLKEYTYPE,'PEM');
        curl_setopt($ch,CURLOPT_SSLKEY, WxPayConf_pub::SSLKEY_PATH);
        //post提交方式
        curl_setopt($ch,CURLOPT_POST, true);
        curl_setopt($ch,CURLOPT_POSTFIELDS,$xml);
        $data = curl_exec($ch);
        //返回结果
        if($data){
            curl_close($ch);
            return $data;
        }
        else { 
            $error = curl_errno($ch);
            echo "curl出错,错误码:$error"."<br>"; 
            echo "<a href='http://curl.haxx.se/libcurl/c/libcurl-errors.html'>错误原因查询</a></br>";
            curl_close($ch);
            return false;
        }
    }

    /**
     *  作用:打印数组
     */
    function printErr($wording='',$err='')
    {
        print_r('<pre>');
        echo $wording."</br>";
        var_dump($err);
        print_r('</pre>');
    }
}

/**
 * 请求型接口的基类
 */
class Wxpay_client_pub extends Common_util_pub 
{
    var $parameters;//请求参数,类型为关联数组
    public $response;//微信返回的响应
    public $result;//返回参数,类型为关联数组
    var $url;//接口链接
    var $curl_timeout;//curl超时时间

    /**
     *  作用:设置请求参数
     */
    function setParameter($parameter, $parameterValue)
    {
        $this->parameters[$this->trimString($parameter)] = $this->trimString($parameterValue);
    }

    /**
     *  作用:设置标配的请求参数,生成签名,生成接口参数xml
     */
    function createXml()
    {
        $this->parameters["appid"] = WxPayConf_pub::APPID;//公众账号ID
        $this->parameters["mch_id"] = WxPayConf_pub::MCHID;//商户号
        $this->parameters["nonce_str"] = $this->createNoncestr();//随机字符串
        $this->parameters["sign"] = $this->getSign($this->parameters);//签名
        return  $this->arrayToXml($this->parameters);
    }

    /**
     *  作用:post请求xml
     */
    function postXml()
    {
        $xml = $this->createXml();
        $this->response = $this->postXmlCurl($xml,$this->url,$this->curl_timeout);
        return $this->response;
    }

    /**
     *  作用:使用证书post请求xml
     */
    function postXmlSSL()
    {   
        $xml = $this->createXml();
        $this->response = $this->postXmlSSLCurl($xml,$this->url,$this->curl_timeout);
        return $this->response;
    }

    /**
     *  作用:获取结果,默认不使用证书
     */
    function getResult() 
    {       
        $this->postXml();
        $this->result = $this->xmlToArray($this->response);
        return $this->result;
    }
}


/**
 * 统一支付接口类
 */
class UnifiedOrder_pub extends Wxpay_client_pub
{   
    function __construct() 
    {
        //设置接口链接
        $this->url = "https://api.mch.weixin.qq.com/pay/unifiedorder";
        //设置curl超时时间
        $this->curl_timeout = WxPayConf_pub::CURL_TIMEOUT;
    }

    /**
     * 生成接口参数xml
     */
    function createXml()
    {
        try
        {
            //检测必填参数
            if($this->parameters["out_trade_no"] == null) 
            {
                throw new SDKRuntimeException("缺少统一支付接口必填参数out_trade_no!"."<br>");
            }elseif($this->parameters["body"] == null){
                throw new SDKRuntimeException("缺少统一支付接口必填参数body!"."<br>");
            }elseif ($this->parameters["total_fee"] == null ) {
                throw new SDKRuntimeException("缺少统一支付接口必填参数total_fee!"."<br>");
            }elseif ($this->parameters["notify_url"] == null) {
                throw new SDKRuntimeException("缺少统一支付接口必填参数notify_url!"."<br>");
            }elseif ($this->parameters["trade_type"] == null) {
                throw new SDKRuntimeException("缺少统一支付接口必填参数trade_type!"."<br>");
            }elseif ($this->parameters["trade_type"] == "JSAPI" &&
                $this->parameters["openid"] == NULL){
                throw new SDKRuntimeException("统一支付接口中,缺少必填参数openid!trade_type为JSAPI时,openid为必填参数!"."<br>");
            }
            $this->parameters["appid"] = WxPayConf_pub::APPID;//公众账号ID
            $this->parameters["mch_id"] = WxPayConf_pub::MCHID;//商户号
            $this->parameters["spbill_create_ip"] = $_SERVER['REMOTE_ADDR'];//终端ip     
            $this->parameters["nonce_str"] = $this->createNoncestr();//随机字符串
            $this->parameters["sign"] = $this->getSign($this->parameters);//签名
            return  $this->arrayToXml($this->parameters);
        }catch (SDKRuntimeException $e)
        {
            die($e->errorMessage());
        }
    }

    /**
     * 获取prepay_id
     */
    function getPrepayId()
    {
        $this->postXml();
        $this->result = $this->xmlToArray($this->response);
        $prepay_id = $this->result["prepay_id"];
        return $prepay_id;
    }

}

/**
 * 订单查询接口
 */
class OrderQuery_pub extends Wxpay_client_pub
{
    function __construct() 
    {
        //设置接口链接
        $this->url = "https://api.mch.weixin.qq.com/pay/orderquery";
        //设置curl超时时间
        $this->curl_timeout = WxPayConf_pub::CURL_TIMEOUT;     
    }

    /**
     * 生成接口参数xml
     */
    function createXml()
    {
        try
        {
            //检测必填参数
            if($this->parameters["out_trade_no"] == null && 
                $this->parameters["transaction_id"] == null) 
            {
                throw new SDKRuntimeException("订单查询接口中,out_trade_no、transaction_id至少填一个!"."<br>");
            }
            $this->parameters["appid"] = WxPayConf_pub::APPID;//公众账号ID
            $this->parameters["mch_id"] = WxPayConf_pub::MCHID;//商户号
            $this->parameters["nonce_str"] = $this->createNoncestr();//随机字符串
            $this->parameters["sign"] = $this->getSign($this->parameters);//签名
            return  $this->arrayToXml($this->parameters);
        }catch (SDKRuntimeException $e)
        {
            die($e->errorMessage());
        }
    }

}

/**
 * 退款申请接口
 */
class Refund_pub extends Wxpay_client_pub
{

    function __construct() {
        //设置接口链接
        $this->url = "https://api.mch.weixin.qq.com/secapi/pay/refund";
        //设置curl超时时间
        $this->curl_timeout = WxPayConf_pub::CURL_TIMEOUT;     
    }

    /**
     * 生成接口参数xml
     */
    function createXml()
    {
        try
        {
            //检测必填参数
            if($this->parameters["out_trade_no"] == null && $this->parameters["transaction_id"] == null) {
                throw new SDKRuntimeException("退款申请接口中,out_trade_no、transaction_id至少填一个!"."<br>");
            }elseif($this->parameters["out_refund_no"] == null){
                throw new SDKRuntimeException("退款申请接口中,缺少必填参数out_refund_no!"."<br>");
            }elseif($this->parameters["total_fee"] == null){
                throw new SDKRuntimeException("退款申请接口中,缺少必填参数total_fee!"."<br>");
            }elseif($this->parameters["refund_fee"] == null){
                throw new SDKRuntimeException("退款申请接口中,缺少必填参数refund_fee!"."<br>");
            }elseif($this->parameters["op_user_id"] == null){
                throw new SDKRuntimeException("退款申请接口中,缺少必填参数op_user_id!"."<br>");
            }
            $this->parameters["appid"] = WxPayConf_pub::APPID;//公众账号ID
            $this->parameters["mch_id"] = WxPayConf_pub::MCHID;//商户号
            $this->parameters["nonce_str"] = $this->createNoncestr();//随机字符串
            $this->parameters["sign"] = $this->getSign($this->parameters);//签名
            return  $this->arrayToXml($this->parameters);
        }catch (SDKRuntimeException $e)
        {
            die($e->errorMessage());
        }
    }
    /**
     *  作用:获取结果,使用证书通信
     */
    function getResult() 
    {       
        $this->postXmlSSL();
        $this->result = $this->xmlToArray($this->response);
        return $this->result;
    }

}


/**
 * 退款查询接口
 */
class RefundQuery_pub extends Wxpay_client_pub
{

    function __construct() {
        //设置接口链接
        $this->url = "https://api.mch.weixin.qq.com/pay/refundquery";
        //设置curl超时时间
        $this->curl_timeout = WxPayConf_pub::CURL_TIMEOUT;     
    }

    /**
     * 生成接口参数xml
     */
    function createXml()
    {       
        try 
        {
            if($this->parameters["out_refund_no"] == null &&
                $this->parameters["out_trade_no"] == null &&
                $this->parameters["transaction_id"] == null &&
                $this->parameters["refund_id "] == null) 
            {
                throw new SDKRuntimeException("退款查询接口中,out_refund_no、out_trade_no、transaction_id、refund_id四个参数必填一个!"."<br>");
            }
            $this->parameters["appid"] = WxPayConf_pub::APPID;//公众账号ID
            $this->parameters["mch_id"] = WxPayConf_pub::MCHID;//商户号
            $this->parameters["nonce_str"] = $this->createNoncestr();//随机字符串
            $this->parameters["sign"] = $this->getSign($this->parameters);//签名
            return  $this->arrayToXml($this->parameters);
        }catch (SDKRuntimeException $e)
        {
            die($e->errorMessage());
        }
    }

    /**
     *  作用:获取结果,使用证书通信
     */
    function getResult() 
    {       
        $this->postXmlSSL();
        $this->result = $this->xmlToArray($this->response);
        return $this->result;
    }

}

/**
 * 对账单接口
 */
class DownloadBill_pub extends Wxpay_client_pub
{

    function __construct() 
    {
        //设置接口链接
        $this->url = "https://api.mch.weixin.qq.com/pay/downloadbill";
        //设置curl超时时间
        $this->curl_timeout = WxPayConf_pub::CURL_TIMEOUT;     
    }

    /**
     * 生成接口参数xml
     */
    function createXml()
    {       
        try 
        {
            if($this->parameters["bill_date"] == null ) 
            {
                throw new SDKRuntimeException("对账单接口中,缺少必填参数bill_date!"."<br>");
            }
            $this->parameters["appid"] = WxPayConf_pub::APPID;//公众账号ID
            $this->parameters["mch_id"] = WxPayConf_pub::MCHID;//商户号
            $this->parameters["nonce_str"] = $this->createNoncestr();//随机字符串
            $this->parameters["sign"] = $this->getSign($this->parameters);//签名
            return  $this->arrayToXml($this->parameters);
        }catch (SDKRuntimeException $e)
        {
            die($e->errorMessage());
        }
    }

    /**
     *  作用:获取结果,默认不使用证书
     */
    function getResult() 
    {       
        $this->postXml();
        $this->result = $this->xmlToArray($this->result_xml);
        return $this->result;
    }



}

/**
 * 短链接转换接口
 */
class ShortUrl_pub extends Wxpay_client_pub
{
    function __construct() 
    {
        //设置接口链接
        $this->url = "https://api.mch.weixin.qq.com/tools/shorturl";
        //设置curl超时时间
        $this->curl_timeout = WxPayConf_pub::CURL_TIMEOUT;     
    }

    /**
     * 生成接口参数xml
     */
    function createXml()
    {       
        try 
        {
            if($this->parameters["long_url"] == null ) 
            {
                throw new SDKRuntimeException("短链接转换接口中,缺少必填参数long_url!"."<br>");
            }
            $this->parameters["appid"] = WxPayConf_pub::APPID;//公众账号ID
            $this->parameters["mch_id"] = WxPayConf_pub::MCHID;//商户号
            $this->parameters["nonce_str"] = $this->createNoncestr();//随机字符串
            $this->parameters["sign"] = $this->getSign($this->parameters);//签名
            return  $this->arrayToXml($this->parameters);
        }catch (SDKRuntimeException $e)
        {
            die($e->errorMessage());
        }
    }

    /**
     * 获取prepay_id
     */
    function getShortUrl()
    {
        $this->postXml();
        $prepay_id = $this->result["short_url"];
        return $prepay_id;
    }

}

/**
 * 响应型接口基类
 */
class Wxpay_server_pub extends Common_util_pub 
{
    public $data;//接收到的数据,类型为关联数组
    var $returnParameters;//返回参数,类型为关联数组

    /**
     * 将微信的请求xml转换成关联数组,以方便数据处理
     */
    function saveData($xml)
    {
        $this->data = $this->xmlToArray($xml);
    }

    function checkSign()
    {
        $tmpData = $this->data;
        unset($tmpData['sign']);
        $sign = $this->getSign($tmpData);//本地签名
        if ($this->data['sign'] == $sign) {
            return TRUE;
        }
        return FALSE;
    }

    /**
     * 获取微信的请求数据
     */
    function getData()
    {       
        return $this->data;
    }

    /**
     * 设置返回微信的xml数据
     */
    function setReturnParameter($parameter, $parameterValue)
    {
        $this->returnParameters[$this->trimString($parameter)] = $this->trimString($parameterValue);
    }

    /**
     * 生成接口参数xml
     */
    function createXml()
    {
        return $this->arrayToXml($this->returnParameters);
    }

    /**
     * 将xml数据返回微信
     */
    function returnXml()
    {
        $returnXml = $this->createXml();
        return $returnXml;
    }
}


/**
 * 通用通知接口
 */
class Notify_pub extends Wxpay_server_pub 
{

}




/**
 * 请求商家获取商品信息接口
 */
class NativeCall_pub extends Wxpay_server_pub
{
    /**
     * 生成接口参数xml
     */
    function createXml()
    {
        if($this->returnParameters["return_code"] == "SUCCESS"){
            $this->returnParameters["appid"] = WxPayConf_pub::APPID;//公众账号ID
            $this->returnParameters["mch_id"] = WxPayConf_pub::MCHID;//商户号
            $this->returnParameters["nonce_str"] = $this->createNoncestr();//随机字符串
            $this->returnParameters["sign"] = $this->getSign($this->returnParameters);//签名
        }
        return $this->arrayToXml($this->returnParameters);
    }

    /**
     * 获取product_id
     */
    function getProductId()
    {
        $product_id = $this->data["product_id"];
        return $product_id;
    }

}

/**
 * 静态链接二维码
 */
class NativeLink_pub  extends Common_util_pub
{
    var $parameters;//静态链接参数
    var $url;//静态链接

    function __construct() 
    {
    }

    /**
     * 设置参数
     */
    function setParameter($parameter, $parameterValue) 
    {
        $this->parameters[$this->trimString($parameter)] = $this->trimString($parameterValue);
    }

    /**
     * 生成Native支付链接二维码
     */
    function createLink()
    {
        try 
        {       
            if($this->parameters["product_id"] == null) 
            {
                throw new SDKRuntimeException("缺少Native支付二维码链接必填参数product_id!"."<br>");
            }           
            $this->parameters["appid"] = WxPayConf_pub::APPID;//公众账号ID
            $this->parameters["mch_id"] = WxPayConf_pub::MCHID;//商户号
            $time_stamp = time();
            $this->parameters["time_stamp"] = "$time_stamp";//时间戳
            $this->parameters["nonce_str"] = $this->createNoncestr();//随机字符串
            $this->parameters["sign"] = $this->getSign($this->parameters);//签名            
            $bizString = $this->formatBizQueryParaMap($this->parameters, false);
            $this->url = "weixin://wxpay/bizpayurl?".$bizString;
        }catch (SDKRuntimeException $e)
        {
            die($e->errorMessage());
        }
    }

    /**
     * 返回链接
     */
    function getUrl() 
    {       
        $this->createLink();
        return $this->url;
    }
}

/**
* JSAPI支付——H5网页端调起支付接口
*/
class JsApi_pub extends Common_util_pub
{
    var $code;//code码,用以获取openid
    var $openid;//用户的openid
    var $parameters;//jsapi参数,格式为json
    var $prepay_id;//使用统一支付接口得到的预支付id
    var $curl_timeout;//curl超时时间

    function __construct() 
    {
        //设置curl超时时间
        $this->curl_timeout = WxPayConf_pub::CURL_TIMEOUT;
    }

    /**
     *  作用:生成可以获得code的url
     */
    function createOauthUrlForCode($redirectUrl)
    {
        $urlObj["appid"] = WxPayConf_pub::APPID;
        $urlObj["redirect_uri"] = "$redirectUrl";
        $urlObj["response_type"] = "code";
        $urlObj["scope"] = "snsapi_base";
        $urlObj["state"] = "STATE"."#wechat_redirect";
        $bizString = $this->formatBizQueryParaMap($urlObj, false);
        return "https://open.weixin.qq.com/connect/oauth2/authorize?".$bizString;
    }

    /**
     *  作用:生成可以获得openid的url
     */
    function createOauthUrlForOpenid()
    {
        $urlObj["appid"] = WxPayConf_pub::APPID;
        $urlObj["secret"] = WxPayConf_pub::APPSECRET;
        $urlObj["code"] = $this->code;
        $urlObj["grant_type"] = "authorization_code";
        $bizString = $this->formatBizQueryParaMap($urlObj, false);
        return "https://api.weixin.qq.com/sns/oauth2/access_token?".$bizString;
    }


    /**
     *  作用:通过curl向微信提交code,以获取openid
     */
    function getOpenid()
    {
        $url = $this->createOauthUrlForOpenid();
        //初始化curl
        $ch = curl_init();
        //设置超时
        // 修改 第二个参数 加了个t
        curl_setopt($ch, CURLOPT_TIMEOUT, $this->curl_timeout);

        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch,CURLOPT_SSL_VERIFYPEER,FALSE);
        curl_setopt($ch,CURLOPT_SSL_VERIFYHOST,FALSE);
        curl_setopt($ch, CURLOPT_HEADER, FALSE);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
        //运行curl,结果以jason形式返回
        $res = curl_exec($ch);
        curl_close($ch);
        //取出openid
        $data = json_decode($res,true);
        $this->openid = $data['openid'];
        return $this->openid;
    }

    /**
     *  作用:设置prepay_id
     */
    function setPrepayId($prepayId)
    {
        $this->prepay_id = $prepayId;
    }

    /**
     *  作用:设置code
     */
    function setCode($code_)
    {
        $this->code = $code_;
    }

    /**
     *  作用:设置jsapi的参数
     */
    public function getParameters()
    {
        $jsApiObj["appId"] = WxPayConf_pub::APPID;
        $timeStamp = time();
        $jsApiObj["timeStamp"] = "$timeStamp";
        $jsApiObj["nonceStr"] = $this->createNoncestr();
        $jsApiObj["package"] = "prepay_id=$this->prepay_id";
        $jsApiObj["signType"] = "MD5";
        $jsApiObj["paySign"] = $this->getSign($jsApiObj);
        $this->parameters = json_encode($jsApiObj);

        return $this->parameters;
    }
}

注意配置一定得写对,还有就是商户号和商户密匙,另外就是签名,还有证书路径,这几点必须注意
重点,支付接口的调用

<?php /** * JS_API支付demo * ==================================================== * 在微信浏览器里面打开H5网页中执行JS调起支付。接口输入输出数据格式为JSON。 * 成功调起支付需要三个步骤: * 步骤1:网页授权获取用户openid * 步骤2:使用统一支付接口,获取prepay_id * 步骤3:使用jsapi调起支付 */ include_once ("WxPayPubHelper/WxPayPubHelper.php"); $jsApi = new JsApi_pub(); // =========步骤1:网页授权获取用户openid============ // 通过code获得openid if (! isset($_GET['code'])) { // 触发微信返回code码 $url = $jsApi->createOauthUrlForCode(WxPayConf_pub::JS_API_CALL_URL); Header("Location: $url"); } else { // 获取code码,以获取openid $code = $_GET['code']; $jsApi->setCode($code); $openid = $jsApi->getOpenId(); } $goods = "test"; // 使用统一支付接口 $unifiedOrder = new UnifiedOrder_pub(); $unifiedOrder->setParameter("openid", "$openid"); // 用户openid $unifiedOrder->setParameter("body", "$goods"); // 商品描述 // 自定义订单号,此处仅作举例 $timeStamp = time(); $out_trade_no = WxPayConf_pub::APPID . "$timeStamp"; // 商户订单号 $unifiedOrder->setParameter("out_trade_no", "$out_trade_no"); $price = "1"; $unifiedOrder->setParameter("total_fee", "$price"); // 总金额 $unifiedOrder->setParameter("notify_url", WxPayConf_pub::NOTIFY_URL); // 通知地址 $unifiedOrder->setParameter("trade_type", "JSAPI"); // 交易类型 $prepay_id = $unifiedOrder->getPrepayId(); // =========步骤3:使用jsapi调起支付============ $jsApi->setPrepayId($prepay_id); $jsApiParameters = $jsApi->getParameters(); echo $jsApiParameters; ?>

<html>
<head>
<meta http-equiv="content-type" content="text/html;charset=utf-8" />
<meta name="viewport" content="width=device-width,initial-scale=1.0" />
<title>微信安全支付</title>

<script type="text/javascript">

        //调用微信JS api 支付
        function jsApiCall()
        {
            WeixinJSBridge.invoke(
                'getBrandWCPayRequest',
                <?php echo $jsApiParameters; ?>,
                function(res){
                    WeixinJSBridge.log(res.err_msg);
                    //alert(res.err_code+res.err_desc+res.err_msg);
                }
            );
        }

        function callpay()
        {
            if (typeof WeixinJSBridge == "undefined"){
                if( document.addEventListener ){
                    document.addEventListener('WeixinJSBridgeReady', jsApiCall, false);
                }else if (document.attachEvent){
                    document.attachEvent('WeixinJSBridgeReady', jsApiCall); 
                    document.attachEvent('onWeixinJSBridgeReady', jsApiCall);
                }
            }else{
                jsApiCall();
            }
        }
    </script>
</head>
<body>
    <p>&nbsp;</p>
    <p>&nbsp;</p>
    <div align="center">
        <table border="1">
            <tr>
                <td>openID</td>
                <td><?php echo $openid;?></td>
            </tr>
            <tr>
                <td>商品名称</td>
                <td><?php echo $goods;?></td>
            </tr>
            <tr>
                <td>订单号</td>
                <td><?php echo $out_trade_no;?></td>
            </tr>
            <tr>
                <td>prepay_id</td>
                <td><?php echo $prepay_id;?></td>
            </tr>
            <tr>
                <td>价格</td>
                <td><?php echo $price;?></td>
            </tr>
        </table>
        <button data-theme="b" type="button" onclick="callpay()">贡献一下</button>
    </div>
</body>
</html>

至于支付成功的回调页面,在配置里就有设置,接下来是回调页面的处理

<?php
/**
 * 通用通知接口demo
 * ====================================================
 * 支付完成后,微信会把相关支付和用户信息发送到商户设定的通知URL,
 * 商户接收回调信息后,根据需要设定相应的处理流程。
 * 
 * 这里举例使用log文件形式记录回调信息。
*/
    include_once("./log_.php");
    include_once("../WxPayPubHelper/WxPayPubHelper.php");

    //使用通用通知接口
    $notify = new Notify_pub();

    //存储微信的回调
    $xml = $GLOBALS['HTTP_RAW_POST_DATA']; 
    $notify->saveData($xml);
    //验证签名,并回应微信。
    //对后台通知交互时,如果微信收到商户的应答不是成功或超时,微信认为通知失败,
    //微信会通过一定的策略(如30分钟共8次)定期重新发起通知,
    //尽可能提高通知的成功率,但微信不保证通知最终能成功。
    if($notify->checkSign() == FALSE){
        $notify->setReturnParameter("return_code","FAIL");//返回状态码
        $notify->setReturnParameter("return_msg","签名失败");//返回信息
    }else{
        $notify->setReturnParameter("return_code","SUCCESS");//设置返回码
    }
    $returnXml = $notify->returnXml();
    echo $returnXml;

    //==商户根据实际情况设置相应的处理流程,此处仅作举例=======

    //以log文件形式记录回调信息
    $log_ = new Log_();
    $log_name="./notify_url.log";//log文件路径
    $log_->log_result($log_name,"【接收到的notify通知】:\n".$xml."\n");

    if($notify->checkSign() == TRUE)
    {
        if ($notify->data["return_code"] == "FAIL") {
            //此处应该更新一下订单状态,商户自行增删操作
            $log_->log_result($log_name,"【通信出错】:\n".$xml."\n");
        }
        elseif($notify->data["result_code"] == "FAIL"){
            //此处应该更新一下订单状态,商户自行增删操作
            $log_->log_result($log_name,"【业务出错】:\n".$xml."\n");
        }
        else{
            //此处应该更新一下订单状态,商户自行增删操作
            $log_->log_result($log_name,"【支付成功】:\n".$xml."\n");
        }
    }
?>

log_.php的内容

<?php

class Log_
{
    // 打印log
    function  log_result($file,$word) 
    {
        $fp = fopen($file,"a");
        flock($fp, LOCK_EX) ;
        fwrite($fp,"执行日期:".strftime("%Y-%m-%d-%H%M%S",time())."\n".$word."\n\n");
        flock($fp, LOCK_UN);
        fclose($fp);
    }
}

?>

以上便是全部的代码了你们,不过路径一定要修改,根据自己的情况修改路径(这里不仅指证书 的路径,还有包含文件的路径)

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转载自blog.csdn.net/qq_35730500/article/details/53811640