威富通支付接口用到的操作类（记录下）

<?php
/**
 * 威富通支付接口
 */
class SwiftpassClient {

    function __construct() {
        //todo
    }

    // 获取请求支付的页面url
    public function getUrl($url, $postData)
    {
        ksort($postData);
        $postData = $this->urlencode_array($postData);
        $postData['sign'] = md5(implode('', $postData) . md5('!!wxpay!!'));
        return $url . '?' . http_build_query($postData);
    }

    // 获取签名信息
    public function getSign($postData, $key)
    {
        $returnStr = '';
        if ($postData) {
            if (isset($postData['sign'])) unset($postData['sign']);
            ksort($postData);
            $signStr = '';
            foreach ($postData as $_k => $_v) {
                $signStr .= "{$_k}={$_v}&";
            }
            $signStr .= 'key=' . $key;
            $returnStr = strtoupper(md5($signStr));
        }

        return $returnStr;
    }

    // 生成随机码 默认16位
    public function getRandKey($digit=16)
    {
        $returnStr = '';
        // A-Za-z0-9 共62个
        $baseKey = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
        $randKeyArr = str_split($baseKey);
        $maxLen = count($randKeyArr);

        for ($i=0; $i<$digit; $i++) {
            // 每10次, 打乱一次
            if (($i % 10) == 0) shuffle($randKeyArr);
            $k = $i % $maxLen;
            $returnStr .= $randKeyArr{$k};
        }

        return $returnStr;
    }

    // 解析PostData xml格式
    public function xmlToArray($xmlStr)
    {
        return json_decode(json_encode(simplexml_load_string($xmlStr, 'SimpleXMLElement', LIBXML_NOCDATA)), true);
    }

    /**
     * 将xml转换成数组
     * @param $xmlData
     * @return array
     */
    public function xmlToArray2($xml) {
        $xml = simplexml_load_string($xml);
        //获取xml编码
        $ret = preg_match ("/<?xml[^>]* encoding="(.*)"[^>]* ?>/i", $xml, $arr);
        if($ret) {
            $encode = strtoupper ( $arr[1] );
        } else {
            $encode = "";
        }
        if($xml && $xml->children()) {
            foreach ($xml->children() as $node){
                //有子节点
                if($node->children()) {
                    $k = $node->getName();
                    $nodeXml = $node->asXML();
                    $v = substr($nodeXml, strlen($k)+2, strlen($nodeXml)-2*strlen($k)-5);

                } else {
                    $k = $node->getName();
                    $v = (string)$node;
                }

                if($encode!="" && $encode != "UTF-8") {
                    $k = iconv("UTF-8", $encode, $k);
                    $v = iconv("UTF-8", $encode, $v);
                }

                $parameters[$k] = $v;
            }
        }
        return $parameters;
    }

    // 数组转xml
    public function arrayToXml($array)
    {
        $returnStr = "<xml>";
        foreach ($array as $key => $val) {
            if (is_numeric($val)) {
               $returnStr .= "<".$key.">".$val."</".$key.">";
            } else {
                $returnStr .= "<".$key."><![CDATA[".$val."]]></".$key.">";
            }
        }
        $returnStr .= "</xml>";
        return $returnStr;
    }


    // 数组值urlencode编码
    public function urlencode_array($array)
    {
        if (is_array($array)) {
            foreach ($array as $_key => $_val) {
                $array[$_key] = $this->urlencode_array($_val);
            }
        } else {
            $array = rawurlencode($array);
        }

        return $array;
    }

    // 数组值urldecode解码
    public function urldecode_array($array)
    {
        if (is_array($array)) {
            foreach ($array as $_key => $_val) {
                $array[$_key] = $this->urldecode_array($_val);
            }
        } else {
            $array = rawurldecode($array);
        }

        return $array;
    }

    // post xml数据
    public function postXml($url, $array)
    {
        // curl初始化设置
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_TIMEOUT, 14);  // 设置超时
        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($ch, CURLOPT_RETURNTRANSFER, TRUE);
        curl_setopt($ch, CURLOPT_POST, true);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $array);

        // 运行curl
        $response = curl_exec($ch);
        curl_close($ch);

        return $response;
    }

    public function postXmlSSL($url, $array)
    {
        // curl初始化设置
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_TIMEOUT, 14);  // 设置超时
        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($ch, CURLOPT_SSLCERTTYPE, 'PEM');
        curl_setopt($ch, CURLOPT_SSLCERT, '证书路径');
        curl_setopt($ch, CURLOPT_SSLKEYTYPE, 'PEM');
        curl_setopt($ch, CURLOPT_SSLKEY, '密钥路径');
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
        curl_setopt($ch, CURLOPT_POST, true);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $array);

        // 运行curl
        $response = curl_exec($ch);
        curl_close($ch);

        return $response;
    }

}
?>