微信支付开发中刷卡支付实例的详细解析

/**

 * 所有接口的基类

 */

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 &#39;【string1】&#39;.$String.&#39;</br>&#39;;

        //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

        curl_setopt($ch, CURLOP_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)

        {

            curl_close($ch);

            return $data;

        }

        else

        {

            $error = curl_errno($ch);

            echo "curl出错，错误码:$error"."<br>";

            echo "<a href=&#39;http://curl.haxx.se/libcurl/c/libcurl-errors.html&#39;>错误原因查询</a></br>";

            curl_close($ch);

            return false;

        }

    }

    /**

     *     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, dirname(__FILE__).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, dirname(__FILE__).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=&#39;http://curl.haxx.se/libcurl/c/libcurl-errors.html&#39;>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(&#39;<pre class="brush:php;toolbar:false">&#39;);

        echo $wording."</br>";

        var_dump($err);

        print_r('