微信支付之公众号支付

最近项目中用到了微信支付，于是找到了这篇资料，为了防止遗忘转载一下，先谢过作者。原文地址：http://www.360us.net/article/22.html

最近把支付宝、银联和微信支付全都做了一遍，目前做的都还只涉及到消费的功能。
做下来感觉就是各个平台的支付流程都是大同小异，签名方式也是一样的。
这里主要总结一下微信支付公众号支付的一些东西。
微信公众号支付的主要流程如下：
1、生成我们自己系统的订单。
2、调用微信支付的统一下单接口把订单信息推给微信。
3、在第二部会返回一个预支付会话标识，然后凭这个标识用JS去调用支付操作。
关于支付页面的url问题，微信要求是最后必须要有“/”，我看到很多文章说不适合MVC结构的程序，我的情况是否定的，MVC结构一样可以。<br>比如url是这个：<codecourier new font-size:12.6000003814697px padding:2px color:rgb background-color:rgb>http://www.example.com/payment/wechatpay/ ,url里面<codecourier new font-size:12.6000003814697px padding:2px color:rgb background-color:rgb>payment是<codecourier new font-size:12.6000003814697px padding:2px color:rgb background-color:rgb>controller,<codecourier new font-size:12.6000003814697px padding:2px color:rgb background-color:rgb>wechatpay是<codecourier new font-size:12.6000003814697px padding:2px color:rgb background-color:rgb>action，这有问题吗？<br>一样可以访问，可以支付，是不是一个真正的目录，在微信看来就是，实际上其实不是。<phelvetica neue grande sans gb yahei micro hei font-size:14px line-height:20px><br><phelvetica neue grande sans gb yahei micro hei font-size:14px line-height:20px>好，下面进入正题。<br><phelvetica neue grande sans gb yahei micro hei font-size:14px line-height:20px><br>微信支付配置如下：<table border="0" cellpadding="0" cellspacing="0" courier new width:803px word-break:break-all color:rgb border:1px solid rgb bottom:auto float:none left:auto line-height:1.1em margin:0.3em outline:0px overflow:auto padding:0px position:relative right:auto top:auto vertical-align:baseline min-height:inherit font-size:13px background:none><tbody><tr> <td> <p>1</p> <p>2</p> <p>3</p> <p>4</p> <p>5</p> </td> <tdcourier new width:766px padding:0px border:0px bottom:auto float:none left:auto line-height:1.1em margin:0px outline:0px overflow:visible position:static right:auto top:auto vertical-align:baseline min-height:inherit font-size:13px background:none><p></p> <p><codecourier new padding:0px color:rgb border:0px bottom:auto float:none left:auto line-height:1.1em margin:0px outline:0px overflow:visible position:static right:auto top:auto vertical-align:baseline width:auto min-height:inherit background:none>$config <codecourier new padding:0px color:black border:0px bottom:auto float:none left:auto line-height:1.1em margin:0px outline:0px overflow:visible position:static right:auto top:auto vertical-align:baseline width:auto min-height:inherit background:none>= [</codecourier></codecourier></p> <p><codecourier new color:rgb padding:0px border:0px bottom:auto float:none left:auto line-height:1.1em margin:0px outline:0px overflow:visible position:static right:auto top:auto vertical-align:baseline width:auto min-height:inherit background:none>    <codecourier new padding:0px color:blue border:0px bottom:auto float:none left:auto line-height:1.1em margin:0px outline:0px overflow:visible position:static right:auto top:auto vertical-align:baseline width:auto min-height:inherit background:none>'mch_id' <codecourier new padding:0px color:black border:0px bottom:auto float:none left:auto line-height:1.1em margin:0px outline:0px overflow:visible position:static right:auto top:auto vertical-align:baseline width:auto min-height:inherit background:none>=> <codecourier new padding:0px color:blue border:0px bottom:auto float:none left:auto line-height:1.1em margin:0px outline:0px overflow:visible position:static right:auto top:auto vertical-align:baseline width:auto min-height:inherit background:none>'1234455666'<codecourier new padding:0px color:black border:0px bottom:auto float:none left:auto line-height:1.1em margin:0px outline:0px overflow:visible position:static right:auto top:auto vertical-align:baseline width:auto min-height:inherit background:none>, <codecourier new padding:0px color:rgb border:0px bottom:auto float:none left:auto line-height:1.1em margin:0px outline:0px overflow:visible position:static right:auto top:auto vertical-align:baseline width:auto min-height:inherit background:none>//商户号</codecourier></codecourier></codecourier></codecourier></codecourier></codecourier></p> <p><codecourier new color:rgb padding:0px border:0px bottom:auto float:none left:auto line-height:1.1em margin:0px outline:0px overflow:visible position:static right:auto top:auto vertical-align:baseline width:auto min-height:inherit background:none>    <codecourier new padding:0px color:blue border:0px bottom:auto float:none left:auto line-height:1.1em margin:0px outline:0px overflow:visible position:static right:auto top:auto vertical-align:baseline width:auto min-height:inherit background:none>'signType' <codecourier new padding:0px color:black border:0px bottom:auto float:none left:auto line-height:1.1em margin:0px outline:0px overflow:visible position:static right:auto top:auto vertical-align:baseline width:auto min-height:inherit background:none>=> <codecourier new padding:0px color:blue border:0px bottom:auto float:none left:auto line-height:1.1em margin:0px outline:0px overflow:visible position:static right:auto top:auto vertical-align:baseline width:auto min-height:inherit background:none>'MD5'<codecourier new padding:0px color:black border:0px bottom:auto float:none left:auto line-height:1.1em margin:0px outline:0px overflow:visible position:static right:auto top:auto vertical-align:baseline width:auto min-height:inherit background:none>, <codecourier new padding:0px color:rgb border:0px bottom:auto float:none left:auto line-height:1.1em margin:0px outline:0px overflow:visible position:static right:auto top:auto vertical-align:baseline width:auto min-height:inherit background:none>//签名方式，目前只有MD5</codecourier></codecourier></codecourier></codecourier></codecourier></codecourier></p> <p><codecourier new color:rgb padding:0px border:0px bottom:auto float:none left:auto line-height:1.1em margin:0px outline:0px overflow:visible position:static right:auto top:auto vertical-align:baseline width:auto min-height:inherit background:none>    <codecourier new padding:0px color:blue border:0px bottom:auto float:none left:auto line-height:1.1em margin:0px outline:0px overflow:visible position:static right:auto top:auto vertical-align:baseline width:auto min-height:inherit background:none>'key' <codecourier new padding:0px color:black border:0px bottom:auto float:none left:auto line-height:1.1em margin:0px outline:0px overflow:visible position:static right:auto top:auto vertical-align:baseline width:auto min-height:inherit background:none>=> <codecourier new padding:0px color:blue border:0px bottom:auto float:none left:auto line-height:1.1em margin:0px outline:0px overflow:visible position:static right:auto top:auto vertical-align:baseline width:auto min-height:inherit background:none>'sdsfdhgjh34343krn3453tnelt'<codecourier new padding:0px color:black border:0px bottom:auto float:none left:auto line-height:1.1em margin:0px outline:0px overflow:visible position:static right:auto top:auto vertical-align:baseline width:auto min-height:inherit background:none>, <codecourier new padding:0px color:rgb border:0px bottom:auto float:none left:auto line-height:1.1em margin:0px outline:0px overflow:visible position:static right:auto top:auto vertical-align:baseline width:auto min-height:inherit background:none>//api密钥</codecourier></codecourier></codecourier></codecourier></codecourier></codecourier></p> <p><codecourier new padding:0px color:black border:0px bottom:auto float:none left:auto line-height:1.1em margin:0px outline:0px overflow:visible position:static right:auto top:auto vertical-align:baseline width:auto min-height:inherit background:none>];</codecourier></p></tdcourier> </tr></tbody></table><phelvetica neue grande sans gb yahei micro hei font-size:14px line-height:20px>Weixinpay代码清单如下：<table border="0" cellpadding="0" cellspacing="0" courier new width:803px word-break:break-all color:rgb border:1px solid rgb bottom:auto float:none left:auto line-height:1.1em margin:0.3em outline:0px overflow:auto padding:0px position:relative right:auto top:auto vertical-align:baseline min-height:inherit font-size:13px background:none><tbody><tr> <td> <p>1</p> <p>2</p> <p>3</p> <p>4</p> <p>5</p> <p>6</p> <p>7</p> <p>8</p> <p>9</p> <p>10</p> <p>11</p> <p>12</p> <p>13</p> 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namespace weixin\components; //这个是命名空间，可以根据需要修改

class WeixinPay

{

    //支付配置

    public $config;

     

    //支付参数

    public $params;

     

    //统一下单url

    const POST_ORDER_URL = 'https://api.mch.weixin.qq.com/pay/unifiedorder';

     

    //订单查询url

    const ORDER_QUERY_URL = 'https://api.mch.weixin.qq.com/pay/orderquery';

     

    /**

     * 创建微信js发起支付参数

     * @return array

     */

    public function createJsPayData()

    {

        $this->params['nonce_str'] = $this->getRandomStr();

        $this->params['sign'] = $this->sign();

         

        $xmlStr = $this->arrayToXml();

         

        $res = $this->postUrl(self::POST_ORDER_URL, $xmlStr);

        $res = $this->xmlToArray($res);

        if( $res['return_code'] == 'SUCCESS' && $res['result_code'] == 'SUCCESS'